
Igor Moskalenko
Sr Res Scientist-Physical
W. W. Hansen Experimental Physics Laboratory
Academic Appointments
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Sr Res Scientist-Physical, W. W. Hansen Experimental Physics Laboratory
Honors & Awards
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Bruno Rossi Prize - Bill Atwood, Peter Michelson, and the Fermi Gamma Ray Space Telescope LAT team, High Energy Astrophysics Division, American Astronomical Society (2011)
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Fellow, American Physical Society (2010)
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Group Achievement Award to Fermi Science Team, NASA (2010)
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Group Achievement Award to the Large Area Telescope Team, NASA (2008)
Boards, Advisory Committees, Professional Organizations
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Guest Editor, Advances in Space Research (ASR), Special Issue “Astrophysics of Cosmic Rays” ASR 70, issue 9 (2022 - 2022)
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Main Scientific Organizer, 44th COSPAR Sci. Assembly, Comm. E1.3 “Origins of Cosmic Rays”, Athens, Greece (2022 - 2022)
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Associate Editor, Advances in Space Research - Editorial Board (2020 - Present)
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Member, MIT Laboratory for Nuclear Science Dean’s Advisory Committee (2020 - Present)
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Main Scientific Organizer, 43rd COSPAR Sci. Assembly, Comm. E1.16 “The Origin of Cosmic Rays”, Sydney, Australia (2020 - 2020)
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Editor, Proc. of 26th Extended European Cosmic Ray Symposium, J. Phys.: Conf. Ser. 1181 (2019 - 2019)
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Guest Editor, Advances in Space Research (ASR), Special Issue “Advances in cosmic-ray astrophysics and related areas,” ASR 64, issue 12 (2019 - 2019)
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Guest Editor, Advances in Space Research (ASR), Special Issue “Origins of Cosmic Rays,” ASR 62, issue 10 (2018 - 2018)
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Main Scientific Organizer, 42nd COSPAR Sci. Assembly, Comm. E1.5 “Origins of Cosmic Rays”, Pasadena (2018 - 2018)
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Member, Yodh Prize Committee (2017 - Present)
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Guest Editor, Advances in Space Research (ASR), Special Issue “Cosmic ray origins: The Viktor Hess centennial anniversary,” ASR 53, issue 10 (2014 - 2014)
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Chair/Member, NASA’s Exec. Committee on Particle Astrophysics (PhysPAG) (2013 - 2018)
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Deputy Organizer, 39th COSPAR Sci. Assembly, Comm. E1.15 “Cosmic ray origins: Viktor Hess Centennial Anniversary”, Mysore, India (2012 - 2012)
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Fellow, American Physical Society (2010 - Present)
Professional Education
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D.Sci. (Habilitation), Space Research Institute, Russian Academy of Sciences, Astrophysics & Stellar Astronomy (2017)
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Ph.D., M.V. Lomonosov Moscow State University, Theoretical Nuclear & Particle Physics (1990)
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M.Sc., M.V. Lomonosov Moscow State University, Theoretical Nuclear & Particle Physics (1985)
Current Research and Scholarly Interests
Particle/high-energy astrophysics, atomic and nuclear physics. Currently working on models of cosmic-ray production and propagation, particle interactions with fields and matter, search for signatures of dark matter and new physics, analysis of diffuse X- and gamma-ray emission, gamma-ray emission from compact objects, SNRs, and solar system bodies. The originator of GALPROP (with A.W.Strong from MPE), a state-of-the-art numerical model and a computer code (C++) for cosmic ray propagation in the Galaxy and production of associated photon emissions
Projects
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GALPROP, a state-of-the-art numerical model and a computer code (C++) for cosmic ray propagation in the Galaxy and production of associated diffuse photon emissions., Stanford University (12/1/1996 - Present)
GALPROP, a state-of-the-art numerical model and a computer code (C++) for cosmic ray propagation in the Galaxy and production of associated photon emissions
Location
Stanford University
Collaborators
- Troy Porter, Stanford University
- Gulli Johannesson, Professor, University of Iceland & NORDITA
For More Information:
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Fermi Gamma Ray Space Telescope - Large Area Telescope (Fermi/LAT), Stanford University (6/1/2005 - Present)
The LAT is an imaging high-energy gamma-ray telescope covering the energy range from about 20 MeV to more than 300 GeV. Such gamma rays are emitted only in the most extreme conditions, by particles moving very nearly at the speed of light. The LAT's field of view covers about 20% of the sky at any time, and it scans continuously, covering the whole sky every three hours.
Location
Stanford University
For More Information:
All Publications
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Preface: Astrophysics of cosmic rays
ADVANCES IN SPACE RESEARCH
2022; 70 (9): 2583-2584
View details for DOI 10.1016/j.asr.2022.08.054
View details for Web of Science ID 000877895800001
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The GALPROP Cosmic-ray Propagation and Nonthermal Emissions Framework: Release v57
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2022; 262 (1)
View details for DOI 10.3847/1538-4365/ac80f6
View details for Web of Science ID 000852035400001
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Gas and Cosmic-Ray Properties in the MBM 53, 54, and 55 Molecular Clouds and the Pegasus Loops Revealed by H i Line Profiles, Dust, and Gamma-Ray Data
ASTROPHYSICAL JOURNAL
2022; 935 (2)
View details for DOI 10.3847/1538-4357/ac7de0
View details for Web of Science ID 000841985000001
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Exploring the MeV sky with a combined coded mask and Compton telescope: the Galactic Explorer with a Coded aperture mask Compton telescope (GECCO)
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2022
View details for DOI 10.1088/1475-7516/2022/07/036
View details for Web of Science ID 000886089800001
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Search for New Cosmic-Ray Acceleration Sites within the 4FGL Catalog Galactic Plane Sources
ASTROPHYSICAL JOURNAL
2022; 933 (2)
View details for DOI 10.3847/1538-4357/ac704f
View details for Web of Science ID 000825100200001
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On the Origin of Observed Cosmic-Ray Spectrum Below 100 TV
ASTROPHYSICAL JOURNAL
2022; 933 (1)
View details for DOI 10.3847/1538-4357/ac7049
View details for Web of Science ID 000820850500001
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Incremental Fermi Large Area Telescope Fourth Source Catalog
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2022; 260 (2)
View details for DOI 10.3847/1538-4365/ac6751
View details for Web of Science ID 000819154400001
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A Hint of a Low-energy Excess in Cosmic-Ray Fluorine
ASTROPHYSICAL JOURNAL
2022; 925 (2)
View details for DOI 10.3847/1538-4357/ac313d
View details for Web of Science ID 000749285200001
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Gamma Rays from Fast Black-hole Winds
ASTROPHYSICAL JOURNAL
2021; 921 (2)
View details for DOI 10.3847/1538-4357/ac1bb2
View details for Web of Science ID 000716730500001
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Inference of the Local Interstellar Spectra of Cosmic-Ray Nuclei Z <= 28 with the GALPROP-HELMOD Framework (vol 250, 27, 2020)
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2021; 256 (2)
View details for DOI 10.3847/1538-4365/ac2518
View details for Web of Science ID 000707916400001
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Catalog of Long-term Transient Sources in the First 10 yr of Fermi-LAT Data
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2021; 256 (1)
View details for DOI 10.3847/1538-4365/ac072a
View details for Web of Science ID 000692874900001
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First Fermi-LAT Solar Flare Catalog (vol 252, 13, 2021)
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2021; 256 (1)
View details for DOI 10.3847/1538-4365/ac2155
View details for Web of Science ID 000696694200001
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The Discovery of a Low-energy Excess in Cosmic-Ray Iron: Evidence of the Past Supernova Activity in the Local Bubble
ASTROPHYSICAL JOURNAL
2021; 913 (1)
Abstract
Since its launch, the Alpha Magnetic Spectrometer-02 (AMS-02) has delivered outstanding quality measurements of the spectra of cosmic-ray (CR) species ( p ¯ , e ±, and nuclei, 1H-8O, 10Ne, 12Mg, 14Si) which resulted in a number of breakthroughs. One of the latest long-awaited surprises is the spectrum of 26Fe just published by AMS-02. Because of the large fragmentation cross section and large ionization energy losses, most of CR iron at low energies is local and may harbor some features associated with relatively recent supernova (SN) activity in the solar neighborhood. Our analysis of the new AMS-02 results, together with Voyager 1 and ACE-CRIS data, reveals an unexpected bump in the iron spectrum and in the Fe/He, Fe/O, and Fe/Si ratios at 1-2 GV, while a similar feature in the spectra of He, O, and Si and in their ratios is absent, hinting at a local source of low-energy CRs. The found excess extends the recent discoveries of radioactive 60Fe deposits in terrestrial and lunar samples and in CRs. We provide an updated local interstellar spectrum (LIS) of iron in the energy range from 1 MeV nucleon-1 to ~10 TeV nucleon-1. Our calculations employ the GALPROP-HELMOD framework, which has proved to be a reliable tool in deriving the LIS of CR p ¯ , e -, and nuclei Z ⩽ 28.
View details for DOI 10.3847/1538-4357/abf11c
View details for Web of Science ID 000655708300001
View details for PubMedID 34646050
View details for PubMedCentralID PMC8506974
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The TeV Cosmic-Ray Bump: A Message from the Epsilon Indi or Epsilon Eridani Star?
The Astrophysical journal
2021; 911 (2)
Abstract
A recently observed bump in the cosmic-ray (CR) spectrum from 0.3 to 30 TV is likely caused by a stellar bow shock that reaccelerates preexisting CRs, which further propagate to the Sun along the magnetic field lines. Along their way, these particles generate an Iroshnikov-Kraichnan (I-K) turbulence that controls their propagation and sustains the bump. Ad hoc fitting of the bump shape requires six adjustable parameters. Our model requires none, merely depending on three physical unknowns that we constrain using the fit. These are the shock Mach number, M, its size, l ⊥, and the distance to it, ζ obs. Altogether, they define the bump rigidity R 0. With M ≈ 1.5-1.6 and R 0 ≈ 4.4 TV, the model fits the data with ≈0.08% accuracy. The fit critically requires the I-K spectrum predicted by the model and rules out the alternatives. These attributes of the fit make an accidental agreement highly unlikely. In turn, the R 0 and M derived from the fit impose the distance-size relation on the shock: ζ obs ( pc ) ~ 10 2 l ⊥ ( pc ) . For sufficiently large bow shocks, l ⊥ = 10-3-10-2 pc, we find the distance of ζ obs = 3-10 pc. Three promising stars in this range are the Scholz's Star at 6.8 pc, Epsilon Indi at 3.6 pc, and Epsilon Eridani at 3.2 pc. Based on their current positions and velocities, we propose that Epsilon Indi and Epsilon Eridani can produce the observed spectral bump. Moreover, Epsilon Eridani's position is only ~6°.7 off of the magnetic field direction in the solar neighborhood, which also changes the CR arrival direction distribution. Given the proximity of these stars, the bump appearance may change in a relatively short time.
View details for DOI 10.3847/1538-4357/abe855
View details for PubMedID 34646049
View details for PubMedCentralID PMC8506973
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The TeV Cosmic-Ray Bump: A Message from the Epsilon Indi or Epsilon Eridani Star?
ASTROPHYSICAL JOURNAL
2021; 911 (2)
View details for DOI 10.3847/1538-4357/abe855
View details for Web of Science ID 000645169400001
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Dark matter interpretation of the Fermi-LAT observations toward the outer halo of M31
PHYSICAL REVIEW D
2021; 103 (2)
View details for DOI 10.1103/PhysRevD.103.023027
View details for Web of Science ID 000613143200001
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Dark matter interpretation of the Fermi-LAT observations toward the outer halo of M31.
Physical review. D. (2016)
2021; 103 (2)
Abstract
An excess γ-ray signal toward the outer halo of M31 has recently been reported. Although other explanations are plausible, the possibility that it arises from dark matter (DM) is valid. In this work we interpret the excess in the framework of DM annihilation, using as our representative case WIMP DM annihilating to bottom quarks, and we perform a detailed study of the systematic uncertainty in the J-factor for the M31 field. We find that the signal favors a DM particle with a mass of ~45-72 GeV. While the mass is well constrained, the systematic uncertainty in the cross section spans 3 orders of magnitude, ranging from ~5 × 10-27-5 × 10-24 cm3 s-1. This high uncertainty is due to two main factors, namely, an uncertainty in the substructure nature and geometry of the DM halos for both M31 and the Milky Way (MW), and correspondingly, an uncertainty in the contribution to the signal from the MW's DM halo along the line of sight. However, under the conditions that the minimum subhalo mass is ≲10-6 M ⊙ and the actual contribution from the MW's DM halo along the line of sight is at least ~30% of its total value, we show that there is a large overlap with the DM interpretations of both the Galactic center (GC) excess and the antiproton excess, while also being compatible with the limits for the MW dwarf spheroidals. More generally, we summarize the results from numerous complementary DM searches in the energy range 10 GeV-300 GeV corresponding to the GC excess and identify a region in parameter space that still remains viable for discovery of the DM particle.
View details for DOI 10.1103/physrevd.103.023027
View details for PubMedID 34646971
View details for PubMedCentralID PMC8506953
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High-energy emission from a magnetar giant flare in the Sculptor galaxy
NATURE ASTRONOMY
2021
View details for DOI 10.1038/s41550-020-01287-8
View details for Web of Science ID 000607487800001
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Inference of the Local Interstellar Spectra of Cosmic-Ray Nuclei Z <= 28 with the GALPROP-HELMOD Framework
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2020; 250 (2)
View details for DOI 10.3847/1538-4365/aba901
View details for Web of Science ID 000576490600001
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The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
ASTROPHYSICAL JOURNAL
2020; 892 (2)
View details for DOI 10.3847/1538-4357/ab791e
View details for Web of Science ID 000523454000001
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Fermi Large Area Telescope Fourth Source Catalog
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2020; 247 (1)
View details for DOI 10.3847/1538-4365/ab6bcb
View details for Web of Science ID 000520200200001
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Fermi and Swift Observations of GRB 190114C: Tracing the Evolution of High-energy Emission from Prompt to Afterglow
ASTROPHYSICAL JOURNAL
2020; 890 (1)
View details for DOI 10.3847/1538-4357/ab5b05
View details for Web of Science ID 000522095800009
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Deciphering the Local Interstellar Spectra of Secondary Nuclei with the Galprop/Helmod Framework and a Hint for Primary Lithium in Cosmic Rays
ASTROPHYSICAL JOURNAL
2020; 889 (2)
View details for DOI 10.3847/1538-4357/ab64f1
View details for Web of Science ID 000537753700002
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Deciphering Residual Emissions: Time-dependent Models for the Nonthermal Interstellar Radiation from the Milky Way
ASTROPHYSICAL JOURNAL
2019; 887 (2)
View details for DOI 10.3847/1538-4357/ab5961
View details for Web of Science ID 000506012000144
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Advances in cosmic-ray astrophysics and related areas
ADVANCES IN SPACE RESEARCH
2019; 64 (12): 2417
View details for DOI 10.1016/j.asr.2019.10.025
View details for Web of Science ID 000501413300001
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Bright Gamma-Ray Flares Observed in GRB 131108A
ASTROPHYSICAL JOURNAL LETTERS
2019; 886 (2)
View details for DOI 10.3847/2041-8213/ab564f
View details for Web of Science ID 000499346800001
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AAfrag: Interpolation routines for Monte Carlo results on secondary production in proton-proton, proton-nucleus and nucleus-nucleus interactions
COMPUTER PHYSICS COMMUNICATIONS
2019; 245
View details for DOI 10.1016/j.cpc.2019.08.001
View details for Web of Science ID 000495477000008
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AMS-100: The next generation magnetic spectrometer in space - An international science platform for physics and astrophysics at Lagrange point 2
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
2019; 944
View details for DOI 10.1016/j.nima.2019.162561
View details for Web of Science ID 000484777800004
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Fermi-LAT Observations of gamma-Ray Emission toward the Outer Halo of M31
ASTROPHYSICAL JOURNAL
2019; 880 (2)
View details for DOI 10.3847/1538-4357/ab2880
View details for Web of Science ID 000478778000023
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Fermi-LAT Observations of γ-Ray Emission toward the Outer Halo of M31.
The Astrophysical journal
2019; 880 (2)
Abstract
The Andromeda galaxy is the closest spiral galaxy to us and has been the subject of numerous studies. It harbors a massive dark matter halo, which may span up to ~600 kpc across and comprises ~90% of the galaxy's total mass. This halo size translates into a large diameter of 42° on the sky, for an M31-Milky Way (MW) distance of 785 kpc, but its presumably low surface brightness makes it challenging to detect with γ-ray telescopes. Using 7.6 yr of Fermi Large Area Telescope (Fermi-LAT) observations, we make a detailed study of the γ-ray emission between 1-100 GeV toward M31's outer halo, with a total field radius of 60° centered at M31, and perform an in-depth analysis of the systematic uncertainties related to the observations. We use the cosmic-ray propagation code GALPROP to construct specialized interstellar emission models to characterize the foreground γ-ray emission from the MW, including a self-consistent determination of the isotropic component. We find evidence for an extended excess that appears to be distinct from the conventional MW foreground, having a total radial extension upward of ~120-200 kpc from the center of M31. We discuss plausible interpretations of the excess emission, but emphasize that uncertainties in the MW foreground-and in particular, modeling of the H i-related components-have not been fully explored and may impact the results.
View details for DOI 10.3847/1538-4357/ab2880
View details for PubMedID 34711992
View details for PubMedCentralID PMC8549762
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Cosmic-Ray Propagation in Light of the Recent Observation of Geminga
ASTROPHYSICAL JOURNAL
2019; 879 (2)
View details for DOI 10.3847/1538-4357/ab258e
View details for Web of Science ID 000474921300007
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Cosmic-Ray Propagation in Light of the Recent Observation of Geminga.
The Astrophysical journal
2019; 879 (2)
Abstract
The High Altitude Water Cherenkov (HAWC) telescope recently observed extended emission around the Geminga and PSR B0656+14 pulsar wind nebulae (PWNe). These observations have been used to estimate cosmic-ray (CR) diffusion coefficients near the PWNe that appear to be more than two orders of magnitude smaller than the diffusion coefficients typically derived for the interstellar medium from measured abundances of secondary species in CRs. Two-zone diffusion models have been proposed as a solution to this discrepancy, where the slower diffusion zone (SDZ) is confined to a small region around the PWN. Such models are shown to successfully reproduce the HAWC observations of the Geminga PWN while retaining consistency with other CR data. It is found that the size of the SDZ influences the predicted positron flux and the spectral shape of the extended γ-ray emission at lower energies that can be observed with the Fermi Large Area Telescope. If the two observed PWNe are not unique, then it is likely that there are similar pockets of slow diffusion around many CR sources elsewhere in the Milky Way. The consequences of such a picture for Galactic CR propagation is explored.
View details for DOI 10.3847/1538-4357/ab258e
View details for PubMedID 34646046
View details for PubMedCentralID PMC8506903
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A Decade of Gamma-Ray Bursts Observed by Fermi-LAT: The Second GRB Catalog
ASTROPHYSICAL JOURNAL
2019; 878 (1)
View details for DOI 10.3847/1538-4357/ab1d4e
View details for Web of Science ID 000471624300001
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MAGIC and Fermi-LAT gamma-ray results on unassociated HAWC sources
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2019; 485 (1): 356–66
View details for DOI 10.1093/mnras/stz089
View details for Web of Science ID 000466786400024
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Unresolved Gamma-Ray Sky through its Angular Power Spectrum
PHYSICAL REVIEW LETTERS
2018; 121 (24)
View details for DOI 10.1103/PhysRevLett.121.241101
View details for Web of Science ID 000452960100001
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A gamma-ray determination of the Universe's star formation history
SCIENCE
2018; 362 (6418): 1031-+
Abstract
The light emitted by all galaxies over the history of the Universe produces the extragalactic background light (EBL) at ultraviolet, optical, and infrared wavelengths. The EBL is a source of opacity for gamma rays via photon-photon interactions, leaving an imprint in the spectra of distant gamma-ray sources. We measured this attenuation using 739 active galaxies and one gamma-ray burst detected by the Fermi Large Area Telescope. This allowed us to reconstruct the evolution of the EBL and determine the star formation history of the Universe over 90% of cosmic time. Our star formation history is consistent with independent measurements from galaxy surveys, peaking at redshift z ~ 2. Upper limits of the EBL at the epoch of reionization suggest a turnover in the abundance of faint galaxies at z ~ 6.
View details for DOI 10.1126/science.aat8123
View details for Web of Science ID 000451609000039
View details for PubMedID 30498122
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Preface: Origins of cosmic rays
ADVANCES IN SPACE RESEARCH
2018; 62 (10): 2729–30
View details for DOI 10.1016/j.asr.2018.04.037
View details for Web of Science ID 000449448700001
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VERITAS and Fermi-LAT Observations of TeV Gamma-Ray Sources Discovered by HAWC in the 2HWC Catalog
ASTROPHYSICAL JOURNAL
2018; 866 (1)
View details for DOI 10.3847/1538-4357/aade4e
View details for Web of Science ID 000446752400024
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Current status and desired precision of the isotopic production cross sections relevant to astrophysics of cosmic rays: Li, Be, B, C, and N
PHYSICAL REVIEW C
2018; 98 (3)
View details for DOI 10.1103/PhysRevC.98.034611
View details for Web of Science ID 000445326000003
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Current status and desired precision of the isotopic production cross sections relevant to astrophysics of cosmic rays: Li, Be, B, C, and N.
Physical review. C
2018; 98 (3)
Abstract
The precision of the current generation of cosmic-ray (CR) experiments, such as AMS-02, PAMELA, CALET, and ISS-CREAM, is now reaching ≈1-3% in a wide range in energy per nucleon from GeV/nucleon to multi-TeV/nucleon. Their correct interpretation could potentially lead to discoveries of new physics and subtle effects that were unthinkable just a decade ago. However, a major obstacle in doing so is the current uncertainty in the isotopic production cross sections that can be as high as 20-50% or even larger in some cases. While there is a recently reached consensus in the astrophysics community that new measurements of cross sections are desirable, no attempt to evaluate the importance of particular reaction channels and their required precision has been made yet. It is, however, clear that it is a huge work that requires an incremental approach. The goal of this study is to provide the ranking of the isotopic cross sections contributing to the production of the most astrophysically important CR Li, Be, B, C, and N species. In this paper, we (i) rank the reaction channels by their importance for a production of a particular isotope, (ii) provide comparisons plots between the models and data used, and (iii) evaluate a generic beam time necessary to reach a 3% precision in the production cross sections pertinent to the AMS-02 experiment. This first road map may become a starting point in the planning of new measurement campaigns that could be carried out in several nuclear and/or particle physics facilities around the world. A comprehensive evaluation of other isotopes Z ⩽ 30 will be a subject of follow-up studies.
View details for DOI 10.1103/physrevc.98.034611
View details for PubMedID 34646970
View details for PubMedCentralID PMC8506905
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Galactic PeVatrons and helping to find them: Effects of galactic absorption on the observed spectra of very high energy gamma-ray sources
PHYSICAL REVIEW D
2018; 98 (4)
View details for DOI 10.1103/PhysRevD.98.041302
View details for Web of Science ID 000443398400001
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The Search for Spatial Extension in High-latitude Sources Detected by the Fermi Large Area Telescope
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2018; 237 (2)
View details for DOI 10.3847/1538-4365/aacdf7
View details for Web of Science ID 000441093400001
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Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
SCIENCE
2018; 361 (6398): 146-+
Abstract
Previous detections of individual astrophysical sources of neutrinos are limited to the Sun and the supernova 1987A, whereas the origins of the diffuse flux of high-energy cosmic neutrinos remain unidentified. On 22 September 2017, we detected a high-energy neutrino, IceCube-170922A, with an energy of ~290 tera-electron volts. Its arrival direction was consistent with the location of a known γ-ray blazar, TXS 0506+056, observed to be in a flaring state. An extensive multiwavelength campaign followed, ranging from radio frequencies to γ-rays. These observations characterize the variability and energetics of the blazar and include the detection of TXS 0506+056 in very-high-energy γ-rays. This observation of a neutrino in spatial coincidence with a γ-ray-emitting blazar during an active phase suggests that blazars may be a source of high-energy neutrinos.
View details for DOI 10.1126/science.aat1378
View details for Web of Science ID 000438449200037
View details for PubMedID 30002226
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Fermi-LAT Observations of LIGO/Virgo Event GW170817
ASTROPHYSICAL JOURNAL
2018; 861 (2)
View details for DOI 10.3847/1538-4357/aac515
View details for Web of Science ID 000437822700010
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Search for Gamma-Ray Emission from the Coma Cluster with Six Years of Fermi-LAT Data (vol 819, 149, 2016)
ASTROPHYSICAL JOURNAL
2018; 860 (1)
View details for DOI 10.3847/1538-4357/aac7c3
View details for Web of Science ID 000435366000010
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Deciphering the Local Interstellar Spectra of Primary Cosmic-Ray Species with HELMOD
ASTROPHYSICAL JOURNAL
2018; 858 (1)
View details for DOI 10.3847/1538-4357/aabc54
View details for Web of Science ID 000431477400012
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Search for Gamma-Ray Emission from Local Primordial Black Holes with the Fermi Large Area Telescope
ASTROPHYSICAL JOURNAL
2018; 857 (1)
View details for DOI 10.3847/1538-4357/aaac7b
View details for Web of Science ID 000429836900014
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GALPROP cosmic-ray propagation code: recent results and updates
ELSEVIER SCIENCE BV. 2018: 129–34
View details for DOI 10.1016/j.nuelphysbps.2018.07.020
View details for Web of Science ID 000466262900020
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GALPROP cosmic-ray propagation code: recent results and updates.
Nuclear and particle physics proceedings
2018; 297-299: 129-134
Abstract
Information on cosmic-ray (CR) composition comes from direct CR measurements while their distribution in the Galaxy is evaluated from observations of their associated diffuse emission in the range from radio to gamma rays. Even though the main interaction processes are identified, more and more precise observations provide an opportunity to study more subtle effects and pose a challenge to the propagation models. GALPROP is a sophisticated CR propagation code that is being developed for about 20 years. It provides a unified framework for interpretations of data from many different types of experiments. It is used for a description of direct CR measurements and associated interstellar emissions (radio to gamma rays), thereby providing important information about CR injection and propagation in the interstellar medium. By accounting for all relevant observables at a time, the GALPROP code brings together theoretical predictions, interpretation of the most recent observations, and helps to reveal the signatures of new phenomena. In this paper we review latest applications of GALPROP and address ongoing and near future improvements. We are discussing effects of different propagation models, and of the transition from cylindrically symmetrical models to a proper 3D description of the components of the interstellar medium and the source distribution.
View details for DOI 10.1016/j.nuclphysbps.2018.07.020
View details for PubMedID 34712850
View details for PubMedCentralID PMC8549768
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The Three-dimensional Spatial Distribution of Interstellar Gas in the Milky Way: Implications for Cosmic Rays and High-energy Gamma-ray Emissions.
The Astrophysical journal
2018; 856 (1)
Abstract
Direct measurements of cosmic ray (CR) species combined with observations of their associated γ-ray emissions can be used to constrain models of CR propagation, trace the structure of the Galaxy, and search for signatures of new physics. The spatial density distribution of interstellar gas is a vital element for all these studies. So far, models have employed the 2D cylindrically symmetric geometry, but their accuracy is well behind that of the available data. In this paper, 3D spatial density models for neutral and molecular hydrogen are constructed based on empirical model fitting to gas line-survey data. The developed density models incorporate spiral arms and account for the warping of the disk, and the increasing gas scale height with radial distance from the Galactic center. They are employed together with the GALPROP CR propagation code to investigate how the new 3D gas models affect calculations of CR propagation and high-energy γ-ray intensity maps. The calculations reveal non-trivial features that are directly related to the new gas models. The best-fit values for propagation model parameters employing 3D gas models are presented and they differ significantly from those derived with the 2D gas density models that have been widely used. The combination of 3D CR and gas density models provide a more realistic basis for the interpretation of non-thermal emissions from the Galaxy.
View details for DOI 10.3847/1538-4357/aab26e
View details for PubMedID 34776517
View details for PubMedCentralID PMC8587814
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The Three-dimensional Spatial Distribution of Interstellar Gas in the Milky Way: Implications for Cosmic Rays and High-energy Gamma-ray Emissions
ASTROPHYSICAL JOURNAL
2018; 856 (1)
View details for DOI 10.3847/1538-4357/aab26e
View details for Web of Science ID 000428306500002
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HelMod in the Works: From Direct Observations to the Local Interstellar Spectrum of Cosmic-Ray Electrons
ASTROPHYSICAL JOURNAL
2018; 854 (2)
View details for DOI 10.3847/1538-4357/aaa75e
View details for Web of Science ID 000425306100017
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Einstein@Home discovers a radio-quiet gamma-ray millisecond pulsar
SCIENCE ADVANCES
2018; 4 (2)
View details for DOI 10.1126/sciadv.aao7228
View details for Web of Science ID 000426845500043
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Einstein@Home discovers a radio-quiet gamma-ray millisecond pulsar.
Science advances
2018; 4 (2): eaao7228
Abstract
Millisecond pulsars (MSPs) are old neutron stars that spin hundreds of times per second and appear to pulsate as their emission beams cross our line of sight. To date, radio pulsations have been detected from all rotation-powered MSPs. In an attempt to discover radio-quiet gamma-ray MSPs, we used the aggregated power from the computers of tens of thousands of volunteers participating in the Einstein@Home distributed computing project to search for pulsations from unidentified gamma-ray sources in Fermi Large Area Telescope data. This survey discovered two isolated MSPs, one of which is the only known rotation-powered MSP to remain undetected in radio observations. These gamma-ray MSPs were discovered in completely blind searches without prior constraints from other observations, raising hopes for detecting MSPs from a predicted Galactic bulge population.
View details for DOI 10.1126/sciadv.aao7228
View details for PubMedID 29503868
View details for PubMedCentralID PMC5829974
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Multi-messenger Observations of a Binary Neutron Star Merger
ASTROPHYSICAL JOURNAL LETTERS
2017; 848 (2)
View details for DOI 10.3847/2041-8213/aa91c9
View details for Web of Science ID 000413211000001
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3FHL: The Third Catalog of Hard Fermi-LAT Sources
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2017; 232 (2)
View details for DOI 10.3847/1538-4365/aa8221
View details for Web of Science ID 000411892800001
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Fermi Observations of the LIGO Event GW170104
ASTROPHYSICAL JOURNAL LETTERS
2017; 846 (1)
View details for DOI 10.3847/2041-8213/aa8319
View details for Web of Science ID 000408509200003
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High-energy Gamma Rays from the Milky Way: Three-dimensional Spatial Models for the Cosmic-Ray and Radiation Field Densities in the Interstellar Medium
ASTROPHYSICAL JOURNAL
2017; 846 (1)
View details for DOI 10.3847/1538-4357/aa844d
View details for Web of Science ID 000409527500017
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The Second Catalog of Flaring Gamma-Ray Sources from the Fermi All-sky Variability Analysis
ASTROPHYSICAL JOURNAL
2017; 846 (1)
View details for DOI 10.3847/1538-4357/aa8092
View details for Web of Science ID 000408687300011
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Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10GeV
ASTROPHYSICAL JOURNAL
2017; 843 (2)
View details for DOI 10.3847/1538-4357/aa775a
View details for Web of Science ID 000405673400013
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Solution of Heliospheric Propagation: Unveiling the Local Interstellar Spectra of Cosmic-ray Species
ASTROPHYSICAL JOURNAL
2017; 840 (2)
View details for DOI 10.3847/1538-4357/aa6e4f
View details for Web of Science ID 000401330100028
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Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope
PHYSICAL REVIEW D
2017; 95 (8)
View details for DOI 10.1103/PhysRevD.95.082007
View details for Web of Science ID 000399807800001
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Gamma-Ray Blazars within the First 2 Billion Years
ASTROPHYSICAL JOURNAL LETTERS
2017; 837 (1)
View details for DOI 10.3847/2041-8213/aa5fff
View details for Web of Science ID 000401605500005
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Observations of M31 and M33 with the Fermi Large Area Telescope: A Galactic Center Excess in Andromeda?
ASTROPHYSICAL JOURNAL
2017; 836 (2)
View details for DOI 10.3847/1538-4357/aa5c3d
View details for Web of Science ID 000395870900001
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Fermi-LAT Observations of High-energy Behind-the-limb Solar Flares
ASTROPHYSICAL JOURNAL
2017; 835 (2)
View details for DOI 10.3847/1538-4357/835/2/219
View details for Web of Science ID 000401154800011
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SEARCHING THE GAMMA-RAY SKY FOR COUNTERPARTS TO GRAVITATIONAL WAVE SOURCES: FERMI GAMMA-RAY BURST MONITOR. AND LARGE AREA TELESCOPE OBSERVATIONS OF LVT151012 AND GW151226
ASTROPHYSICAL JOURNAL
2017; 835 (1)
View details for DOI 10.3847/1538-4357/835/1/82
View details for Web of Science ID 000393455400082
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GALACTIC COSMIC RAYS IN THE LOCAL INTERSTELLAR MEDIUM: VOYAGER 1 OBSERVATIONS AND MODEL RESULTS
ASTROPHYSICAL JOURNAL
2016; 831 (1)
View details for DOI 10.3847/0004-637X/831/1/18
View details for Web of Science ID 000386794900012
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LOCALIZATION AND BROADBAND FOLLOW-UP OF THE GRAVITATIONAL-WAVE TRANSIENT GW 150914
ASTROPHYSICAL JOURNAL LETTERS
2016; 826 (1)
View details for DOI 10.3847/2041-8205/826/1/L13
View details for Web of Science ID 000380739300013
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FERMI LARGE AREA TELESCOPE DETECTION OF EXTENDED GAMMA-RAY EMISSION FROM THE RADIO GALAXY FORNAX A
ASTROPHYSICAL JOURNAL
2016; 826 (1)
View details for DOI 10.3847/0004-637X/826/1/1
View details for Web of Science ID 000381962200001
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SUPPLEMENT: "LOCALIZATION AND BROADBAND FOLLOW-UP OF THE GRAVITATIONAL-WAVE TRANSIENT GW150914" (2016, ApJL, 826, L13)
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2016; 225 (1)
View details for DOI 10.3847/0067-0049/225/1/8
View details for Web of Science ID 000382309000008
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BAYESIAN ANALYSIS OF COSMIC RAY PROPAGATION: EVIDENCE AGAINST HOMOGENEOUS DIFFUSION
ASTROPHYSICAL JOURNAL
2016; 824 (1)
View details for DOI 10.3847/0004-637X/824/1/16
View details for Web of Science ID 000377937300016
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MINUTE-TIMESCALE > 100 MeV gamma-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
ASTROPHYSICAL JOURNAL LETTERS
2016; 824 (2)
View details for DOI 10.3847/2041-8205/824/2/L20
View details for Web of Science ID 000378168200004
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FERMI-LAT OBSERVATIONS OF THE LIGO EVENT GW150914
ASTROPHYSICAL JOURNAL LETTERS
2016; 823 (1)
View details for DOI 10.3847/2041-8205/823/1/L2
View details for Web of Science ID 000376391700002
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THE FIRST FERMI LAT SUPERNOVA REMNANT CATALOG
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2016; 224 (1)
View details for DOI 10.3847/0067-0049/224/1/8
View details for Web of Science ID 000377050200008
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Search for Spectral Irregularities due to Photon-Axionlike-Particle Oscillations with the Fermi Large Area Telescope
PHYSICAL REVIEW LETTERS
2016; 116 (16)
Abstract
We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in the γ-ray spectrum of NGC 1275, the central galaxy of the Perseus cluster. Using 6 years of Fermi Large Area Telescope data, we find no evidence for ALPs and exclude couplings above 5×10^{-12} GeV^{-1} for ALP masses 0.5≲m_{a}≲5 neV at 95% confidence. The limits are competitive with the sensitivity of planned laboratory experiments, and, together with other bounds, strongly constrain the possibility that ALPs can reduce the γ-ray opacity of the Universe.
View details for DOI 10.1103/PhysRevLett.116.161101
View details for Web of Science ID 000374559300002
View details for PubMedID 27152783
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Resolving the Extragalactic gamma-Ray Background above 50 GeV with the Fermi Large Area Telescope
PHYSICAL REVIEW LETTERS
2016; 116 (15)
Abstract
The Fermi Large Area Telescope (LAT) Collaboration has recently released a catalog of 360 sources detected above 50 GeV (2FHL). This catalog was obtained using 80 months of data re-processed with Pass 8, the newest event-level analysis, which significantly improves the acceptance and angular resolution of the instrument. Most of the 2FHL sources at high Galactic latitude are blazars. Using detailed Monte Carlo simulations, we measure, for the first time, the source count distribution, dN/dS, of extragalactic γ-ray sources at E>50 GeV and find that it is compatible with a Euclidean distribution down to the lowest measured source flux in the 2FHL (∼8×10^{-12} ph cm^{-2} s^{-1}). We employ a one-point photon fluctuation analysis to constrain the behavior of dN/dS below the source detection threshold. Overall, the source count distribution is constrained over three decades in flux and found compatible with a broken power law with a break flux, S_{b}, in the range [8×10^{-12},1.5×10^{-11}] ph cm^{-2} s^{-1} and power-law indices below and above the break of α_{2}∈[1.60,1.75] and α_{1}=2.49±0.12, respectively. Integration of dN/dS shows that point sources account for at least 86_{-14}^{+16}% of the total extragalactic γ-ray background. The simple form of the derived source count distribution is consistent with a single population (i.e., blazars) dominating the source counts to the minimum flux explored by this analysis. We estimate the density of sources detectable in blind surveys that will be performed in the coming years by the Cherenkov Telescope Array.
View details for DOI 10.1103/PhysRevLett.116.151105
View details for PubMedID 27127954
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CONTEMPORANEOUS BROADBAND OBSERVATIONS OF THREE HIGH-REDSHIFT BL LAC OBJECTS
ASTROPHYSICAL JOURNAL
2016; 820 (1)
View details for DOI 10.3847/0004-637X/820/1/72
View details for Web of Science ID 000372787000071
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SEARCH FOR GAMMA-RAY EMISSION FROM THE COMA CLUSTER WITH SIX YEARS OF FERMI-LAT DATA
ASTROPHYSICAL JOURNAL
2016; 819 (2)
View details for DOI 10.3847/0004-637X/819/2/149
View details for Web of Science ID 000372305700061
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DEEP MORPHOLOGICAL AND SPECTRAL STUDY OF THE SNR RCW 86 WITH FERMI-LAT
ASTROPHYSICAL JOURNAL
2016; 819 (2)
View details for DOI 10.3847/0004-637X/819/2/98
View details for Web of Science ID 000372305700010
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FERMI-LAT OBSERVATIONS OF HIGH-ENERGY gamma-RAY EMISSION TOWARD THE GALACTIC CENTER
ASTROPHYSICAL JOURNAL
2016; 819 (1)
View details for DOI 10.3847/0004-637X/819/1/44
View details for Web of Science ID 000372303400044
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2FHL: THE SECOND CATALOG OF HARD FERMI-LAT SOURCES
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2016; 222 (1)
View details for DOI 10.3847/0067-0049/222/1/5
View details for Web of Science ID 000368982300005
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VERY HIGH ENERGY gamma-RAYS FROM THE UNIVERSE'S MIDDLE AGE: DETECTION OF THE z=0.940 BLAZAR PKS 1441+25 WITH MAGIC
ASTROPHYSICAL JOURNAL LETTERS
2015; 815 (2)
View details for DOI 10.1088/2041-8205/815/2/L23
View details for Web of Science ID 000369081700007
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An extremely bright gamma-ray pulsar in the Large Magellanic Cloud
SCIENCE
2015; 350 (6262): 801-805
Abstract
Pulsars are rapidly spinning, highly magnetized neutron stars, created in the gravitational collapse of massive stars. We report the detection of pulsed giga-electron volt gamma rays from the young pulsar PSR J0540-6919 in the Large Magellanic Cloud, a satellite galaxy of the Milky Way. This is the first gamma-ray pulsar detected in another galaxy. It has the most luminous pulsed gamma-ray emission yet observed, exceeding the Crab pulsar's by a factor of 20. PSR J0540-6919 presents an extreme test case for understanding the structure and evolution of neutron star magnetospheres.
View details for DOI 10.1126/science.aac7400
View details for Web of Science ID 000364897000041
View details for PubMedID 26564852
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MULTIWAVELENGTH EVIDENCE FOR QUASI-PERIODIC MODULATION IN THE GAMMA-RAY BLAZAR PG 1553+113
ASTROPHYSICAL JOURNAL LETTERS
2015; 813 (2)
View details for DOI 10.1088/2041-8205/813/2/L41
View details for Web of Science ID 000365035000019
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SEARCH FOR EXTENDED GAMMA-RAY EMISSION FROM THE VIRGO GALAXY CLUSTER WITH FERMI-LAT
ASTROPHYSICAL JOURNAL
2015; 812 (2)
View details for DOI 10.1088/0004-637X/812/2/159
View details for Web of Science ID 000365206600071
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THE THIRD CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2015; 810 (1)
View details for DOI 10.1088/0004-637X/810/1/14
View details for Web of Science ID 000361800900014
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PSR J1906+0722: AN ELUSIVE GAMMA-RAY PULSAR
ASTROPHYSICAL JOURNAL LETTERS
2015; 809 (1)
View details for DOI 10.1088/2041-8205/809/1/L2
View details for Web of Science ID 000359321900002
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FERMI-LAT OBSERVATIONS OF HIGH- AND INTERMEDIATE-VELOCITY CLOUDS: TRACING COSMIC RAYS IN THE HALO OF THE MILKY WAY
ASTROPHYSICAL JOURNAL
2015; 807 (2)
View details for DOI 10.1088/0004-637X/807/2/161
View details for Web of Science ID 000358967000047
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SECOND CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE (vol 743, 171, 2011)
ASTROPHYSICAL JOURNAL
2015; 806 (1)
View details for DOI 10.1088/0004-637X/806/1/144
View details for Web of Science ID 000356810300144
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FERMI LARGE AREA TELESCOPE THIRD SOURCE CATALOG
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2015; 218 (2)
View details for DOI 10.1088/0067-0049/218/2/23
View details for Web of Science ID 000357122200009
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NEW CALCULATION OF ANTIPROTON PRODUCTION BY COSMIC RAY PROTONS AND NUCLEI.
The Astrophysical journal
2015; 803 (2)
Abstract
A dramatic increase in the accuracy and statistics of space-borne cosmic ray (CR) measurements has yielded several breakthroughs over the last several years. The most puzzling is the rise in the positron fraction above ~10 GeV over the predictions of the propagation models assuming pure secondary production. The accuracy of the antiproton production cross section is critical for astrophysical applications and searches for new physics since antiprotons in CRs seem to hold the keys to many puzzles including the origin of those excess positrons. However, model calculations of antiproton production in CR interactions with interstellar gas are often employing parameterizations that are out of date or are using outdated physical concepts. This may lead to an incorrect interpretation of antiproton data which could have broad consequences for other areas of astrophysics. In this work, we calculate antiproton production in pp-, pA-, and AA-interactions using EPOS-LHC and QGSJET-II-04, two of the most advanced Monte Carlo (MC) generators tuned to numerous accelerator data including those from the Large Hadron Collider (LHC). We show that the antiproton yields obtained with these MC generators differ by up to an order of magnitude from yields of parameterizations commonly used in astrophysics.
View details for DOI 10.1088/0004-637x/803/2/54
View details for PubMedID 34646040
View details for PubMedCentralID PMC8506943
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NEW CALCULATION OF ANTIPROTON PRODUCTION BY COSMIC RAY PROTONS AND NUCLEI
ASTROPHYSICAL JOURNAL
2015; 803 (2)
View details for DOI 10.1088/0004-637X/803/2/54
View details for Web of Science ID 000353524500006
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GAMMA-RAY FLARING ACTIVITY FROM THE GRAVITATIONALLY LENSED BLAZAR PKS 1830-211 OBSERVED BY Fermi LAT
ASTROPHYSICAL JOURNAL
2015; 799 (2)
View details for DOI 10.1088/0004-637X/799/2/143
View details for Web of Science ID 000348820900030
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THE SPECTRUM OF ISOTROPIC DIFFUSE GAMMA-RAY EMISSION BETWEEN 100 MeV AND 820 GeV
ASTROPHYSICAL JOURNAL
2015; 799 (1)
View details for DOI 10.1088/0004-637X/799/1/86
View details for Web of Science ID 000348214500084
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AN EXTREME GRAVITATIONALLY REDSHIFTED IRON LINE AT 4.8 KeV IN Mrk 876
ASTROPHYSICAL JOURNAL LETTERS
2015; 798 (1)
View details for DOI 10.1088/2041-8205/798/1/L14
View details for Web of Science ID 000347462300014
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THE SPECTRUM AND MORPHOLOGY OF THE FERMI BUBBLES
ASTROPHYSICAL JOURNAL
2014; 793 (1)
View details for DOI 10.1088/0004-637X/793/1/64
View details for Web of Science ID 000341301700064
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Fermi establishes classical novae as a distinct class of gamma-ray sources
SCIENCE
2014; 345 (6196): 554-558
View details for DOI 10.1126/science.1253947
View details for Web of Science ID 000339651300043
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NUCLEAR ENHANCEMENT OF THE PHOTON YIELD IN COSMIC RAY INTERACTIONS
ASTROPHYSICAL JOURNAL
2014; 789 (2)
View details for DOI 10.1088/0004-637X/789/2/136
View details for Web of Science ID 000338674900045
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NUCLEAR ENHANCEMENT OF THE PHOTON YIELD IN COSMIC RAY INTERACTIONS.
The Astrophysical journal
2014; 789 (2)
Abstract
The concept of the nuclear enhancement factor has been used since the beginning of γ-ray astronomy. It provides a simple and convenient way to account for the contribution of nuclei (A > 1) in cosmic rays (CRs) and in the interstellar medium (ISM) to the diffuse γ-ray emission. An accurate treatment of the dominant emission process, such as hadronic interactions of CRs with the ISM, enables one to study CR acceleration processes and CR propagation in the ISM, and provides a reliable background model for searches of new phenomena. The Fermi Large Area Telescope launched in 2008 provides excellent quality data in a wide energy range 30 MeV-1 TeV where the diffuse emission accounts for the majority of photons. Exploiting its data to the fullest requires a new study of the processes of γ-ray production in hadronic interactions. In this paper we point out that several commonly used studies of the nuclear enhancement factor fail to account for the spectrally averaged energy loss fraction which ensures that the energy fraction transferred to photons is averaged properly with the spectra of CR species. We present a new calculation of the spectrally averaged energy loss fraction and the nuclear enhancement factor using the QGSJET-II-04 and EPOS-LHC interaction models.
View details for DOI 10.1088/0004-637x/789/2/136
View details for PubMedID 34646039
View details for PubMedCentralID PMC8506899
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IMPULSIVE AND LONG DURATION HIGH-ENERGY GAMMA-RAY EMISSION FROM THE VERY BRIGHT 2012 MARCH 7 SOLAR FLARES
ASTROPHYSICAL JOURNAL
2014; 789 (1)
View details for DOI 10.1088/0004-637X/789/1/20
View details for Web of Science ID 000338103400020
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SEARCH FOR COSMIC-RAY-INDUCED GAMMA-RAY EMISSION IN GALAXY CLUSTERS
ASTROPHYSICAL JOURNAL
2014; 787 (1)
View details for DOI 10.1088/0004-637X/787/1/18
View details for Web of Science ID 000335924200018
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HIGH-ENERGY GAMMA-RAY EMISSION FROM SOLAR FLARES: SUMMARY OF FERMI LARGE AREA TELESCOPE DETECTIONS AND ANALYSIS OF TWO M-CLASS FLARES
ASTROPHYSICAL JOURNAL
2014; 787 (1)
View details for DOI 10.1088/0004-637X/787/1/15
View details for Web of Science ID 000335924200015
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PREFACE: Cosmic ray origins: The Viktor Hess centennial anniversary
ADVANCES IN SPACE RESEARCH
2014; 53 (10): 1377–78
View details for DOI 10.1016/j.asr.2014.03.013
View details for Web of Science ID 000337013700001
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MULTIFREQUENCY STUDIES OF THE PECULIAR QUASAR 4C+21.35 DURING THE 2010 FLARING ACTIVITY
ASTROPHYSICAL JOURNAL
2014; 786 (2)
View details for DOI 10.1088/0004-637X/786/2/157
View details for Web of Science ID 000335884500080
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Inferred Cosmic-Ray Spectrum from Fermi Large Area Telescope gamma-Ray Observations of Earth's Limb
PHYSICAL REVIEW LETTERS
2014; 112 (15)
Abstract
Recent accurate measurements of cosmic-ray (CR) species by ATIC-2, CREAM, and PAMELA reveal an unexpected hardening in the proton and He spectra above a few hundred GeV, a gradual softening of the spectra just below a few hundred GeV, and a harder spectrum of He compared to that of protons. These newly discovered features may offer a clue to the origin of high-energy CRs. We use the Fermi Large Area Telescope observations of the γ-ray emission from Earth's limb for an indirect measurement of the local spectrum of CR protons in the energy range ∼90 GeV-6 TeV (derived from a photon energy range 15 GeV-1 TeV). Our analysis shows that single power law and broken power law spectra fit the data equally well and yield a proton spectrum with index 2.68±0.04 and 2.61±0.08 above ∼200 GeV, respectively.
View details for DOI 10.1103/PhysRevLett.112.151103
View details for Web of Science ID 000334597300003
View details for PubMedID 24785023
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Fermi LARGE AREA TELESCOPE OBSERVATIONS OF BLAZAR 3C 279 OCCULTATIONS BY THE SUN
ASTROPHYSICAL JOURNAL
2014; 784 (2)
View details for DOI 10.1088/0004-637X/784/2/118
View details for Web of Science ID 000335519400033
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Dark matter constraints from observations of 25 Milky Way satellite galaxies with the Fermi Large Area Telescope
PHYSICAL REVIEW D
2014; 89 (4)
View details for DOI 10.1103/PhysRevD.89.042001
View details for Web of Science ID 000339630400001
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Fermi-LAT Observations of the Gamma-Ray Burst GRB 130427A
SCIENCE
2014; 343 (6166): 42-47
Abstract
The observations of the exceptionally bright gamma-ray burst (GRB) 130427A by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope provide constraints on the nature of these unique astrophysical sources. GRB 130427A had the largest fluence, highest-energy photon (95 GeV), longest γ-ray duration (20 hours), and one of the largest isotropic energy releases ever observed from a GRB. Temporal and spectral analyses of GRB 130427A challenge the widely accepted model that the nonthermal high-energy emission in the afterglow phase of GRBs is synchrotron emission radiated by electrons accelerated at an external shock.
View details for DOI 10.1126/science.1242353
View details for Web of Science ID 000329162000042
View details for PubMedID 24263133
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DISCOVERY OF GeV EMISSION FROM THE CIRCINUS GALAXY WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2013; 779 (2)
View details for DOI 10.1088/0004-637X/779/2/131
View details for Web of Science ID 000328187200041
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THE FIRST FERMI-LAT CATALOG OF SOURCES ABOVE 10 GeV
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2013; 209 (2)
View details for DOI 10.1088/0067-0049/209/2/34
View details for Web of Science ID 000328059500016
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FERMI LARGE AREA TELESCOPE STUDY OF COSMIC-RAYS AND THE INTERSTELLAR MEDIUM IN NEARBY MOLECULAR CLOUDS (vol 755, 22, 2012)
ASTROPHYSICAL JOURNAL
2013; 778 (1)
View details for DOI 10.1088/0004-637X/778/1/82
View details for Web of Science ID 000327131700082
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Search for gamma-ray spectral lines with the Fermi Large Area Telescope and dark matter implications
PHYSICAL REVIEW D
2013; 88 (8)
View details for DOI 10.1103/PhysRevD.88.082002
View details for Web of Science ID 000326107300001
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THE SECOND FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2013; 208 (2)
View details for DOI 10.1088/0067-0049/208/2/17
View details for Web of Science ID 000325276600004
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Cosmic Rays in the Milky Way and Beyond.
Nuclear physics. B, Proceedings, supplements
2013; 243: 85-91
Abstract
Cosmic rays (CRs) are the probes of the deep space. They allow us to study particle acceleration, chemical composition of the interstellar medium, and global properties of our Galaxy. However, until recently studies of CRs were similar to astronomical observations with blurred lenses that capture only the integral brightness of all stars in the field of view. Thanks to the recent technological developments, our "lenses" are now capable of capturing sharp images and making precise measurements of all CR species. We have a full range of unique instrumentation for direct measurements of CRs in space and for multi-wavelength observations of their emissions and more missions are coming. The unveiling picture is astonishing. This paper gives a short overview of very exciting developments in astrophysics of CRs in the Milky Way and in other star-forming galaxies.
View details for DOI 10.1016/j.nuclphysbps.2013.09.014
View details for PubMedID 34646058
View details for PubMedCentralID PMC8506898
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Cosmic Rays in the Milky Way and Beyond
ELSEVIER SCIENCE BV. 2013: 85–91
View details for DOI 10.1016/j.nuclphysbps.2013.09.014
View details for Web of Science ID 000329959000012
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ASSOCIATING LONG-TERM gamma-RAY VARIABILITY WITH THE SUPERORBITAL PERIOD OF LS I+61 degrees 303
ASTROPHYSICAL JOURNAL LETTERS
2013; 773 (2)
View details for DOI 10.1088/2041-8205/773/2/L35
View details for Web of Science ID 000322899600018
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CONSTRAINTS ON THE GALACTIC POPULATION OF TeV PULSAR WIND NEBULAE USING FERMI LARGE AREA TELESCOPE OBSERVATIONS
ASTROPHYSICAL JOURNAL
2013; 773 (1)
View details for DOI 10.1088/0004-637X/773/1/77
View details for Web of Science ID 000322531900077
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CONSTRAINTS ON THE COSMIC-RAY DENSITY GRADIENT BEYOND THE SOLAR CIRCLE FROM FERMI gamma-RAY OBSERVATIONS OF THE THIRD GALACTIC QUADRANT (vol 726, pg 81, 2011)
ASTROPHYSICAL JOURNAL
2013; 772 (2)
View details for DOI 10.1088/0004-637X/772/2/154
View details for Web of Science ID 000322024700076
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THE FERMI ALL-SKY VARIABILITY ANALYSIS: A LIST OF FLARING GAMMA-RAY SOURCES AND THE SEARCH FOR TRANSIENTS IN OUR GALAXY
ASTROPHYSICAL JOURNAL
2013; 771 (1)
View details for DOI 10.1088/0004-637X/771/1/57
View details for Web of Science ID 000321274200057
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ANALYTIC SOLUTION FOR SELF-REGULATED COLLECTIVE ESCAPE OF COSMIC RAYS FROM THEIR ACCELERATION SITES
ASTROPHYSICAL JOURNAL
2013; 768 (1)
View details for DOI 10.1088/0004-637X/768/1/73
View details for Web of Science ID 000317960500073
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DETERMINATION OF THE POINT-SPREAD FUNCTION FOR THE FERMI LARGE AREA TELESCOPE FROM ON-ORBIT DATA AND LIMITS ON PAIR HALOS OF ACTIVE GALACTIC NUCLEI
ASTROPHYSICAL JOURNAL
2013; 765 (1)
View details for DOI 10.1088/0004-637X/765/1/54
View details for Web of Science ID 000314957900054
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Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
SCIENCE
2013; 339 (6121): 807-811
Abstract
Cosmic rays are particles (mostly protons) accelerated to relativistic speeds. Despite wide agreement that supernova remnants (SNRs) are the sources of galactic cosmic rays, unequivocal evidence for the acceleration of protons in these objects is still lacking. When accelerated protons encounter interstellar material, they produce neutral pions, which in turn decay into gamma rays. This offers a compelling way to detect the acceleration sites of protons. The identification of pion-decay gamma rays has been difficult because high-energy electrons also produce gamma rays via bremsstrahlung and inverse Compton scattering. We detected the characteristic pion-decay feature in the gamma-ray spectra of two SNRs, IC 443 and W44, with the Fermi Large Area Telescope. This detection provides direct evidence that cosmic-ray protons are accelerated in SNRs.
View details for DOI 10.1126/science.1231160
View details for Web of Science ID 000314874400045
View details for PubMedID 23413352
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MULTIWAVELENGTH OBSERVATIONS OF GRB 110731A: GeV EMISSION FROM ONSET TO AFTERGLOW
ASTROPHYSICAL JOURNAL
2013; 763 (2)
View details for DOI 10.1088/0004-637X/763/2/71
View details for Web of Science ID 000313869800002
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Cosmic Rays in the Milky Way
AMER INST PHYSICS. 2013: 156–61
View details for DOI 10.1063/1.4792560
View details for Web of Science ID 000316575600030
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CONSTRAINTS ON THE GALACTIC HALO DARK MATTER FROM FERMI-LAT DIFFUSE MEASUREMENTS
ASTROPHYSICAL JOURNAL
2012; 761 (2)
View details for DOI 10.1088/0004-637X/761/2/91
View details for Web of Science ID 000312090300010
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Binary Millisecond Pulsar Discovery via Gamma-Ray Pulsations
SCIENCE
2012; 338 (6112): 1314-1317
Abstract
Millisecond pulsars, old neutron stars spun up by accreting matter from a companion star, can reach high rotation rates of hundreds of revolutions per second. Until now, all such "recycled" rotation-powered pulsars have been detected by their spin-modulated radio emission. In a computing-intensive blind search of gamma-ray data from the Fermi Large Area Telescope (with partial constraints from optical data), we detected a 2.5-millisecond pulsar, PSR J1311-3430. This unambiguously explains a formerly unidentified gamma-ray source that had been a decade-long enigma, confirming previous conjectures. The pulsar is in a circular orbit with an orbital period of only 93 minutes, the shortest of any spin-powered pulsar binary ever found.
View details for DOI 10.1126/science.1229054
View details for Web of Science ID 000311991200058
View details for PubMedID 23112297
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The Imprint of the Extragalactic Background Light in the Gamma-Ray Spectra of Blazars
SCIENCE
2012; 338 (6111): 1190-1192
Abstract
The light emitted by stars and accreting compact objects through the history of the universe is encoded in the intensity of the extragalactic background light (EBL). Knowledge of the EBL is important to understand the nature of star formation and galaxy evolution, but direct measurements of the EBL are limited by galactic and other foreground emissions. Here, we report an absorption feature seen in the combined spectra of a sample of gamma-ray blazars out to a redshift of z ∼ 1.6. This feature is caused by attenuation of gamma rays by the EBL at optical to ultraviolet frequencies and allowed us to measure the EBL flux density in this frequency band.
View details for DOI 10.1126/science.1227160
View details for Web of Science ID 000311666200040
View details for PubMedID 23118013
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THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2012; 203 (1)
View details for DOI 10.1088/0067-0049/203/1/4
View details for Web of Science ID 000310908300004
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FERMI OBSERVATIONS OF gamma-RAY EMISSION FROM THE MOON
ASTROPHYSICAL JOURNAL
2012; 758 (2)
View details for DOI 10.1088/0004-637X/758/2/140
View details for Web of Science ID 000310562000069
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GAMMA-RAY OBSERVATIONS OF THE ORION MOLECULAR CLOUDS WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2012; 756 (1)
View details for DOI 10.1088/0004-637X/756/1/4
View details for Web of Science ID 000309044300004
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GeV OBSERVATIONS OF STAR-FORMING GALAXIES WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2012; 755 (2)
View details for DOI 10.1088/0004-637X/755/2/164
View details for Web of Science ID 000307791400081
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FERMI LARGE AREA TELESCOPE STUDY OF COSMIC RAYS AND THE INTERSTELLAR MEDIUM IN NEARBY MOLECULAR CLOUDS
ASTROPHYSICAL JOURNAL
2012; 755 (1)
View details for DOI 10.1088/0004-637X/755/1/22
View details for Web of Science ID 000306909500022
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CONSTRAINING THE HIGH-ENERGY EMISSION FROM GAMMA-RAY BURSTS WITH FERMI
ASTROPHYSICAL JOURNAL
2012; 754 (2)
View details for DOI 10.1088/0004-637X/754/2/121
View details for Web of Science ID 000306666700042
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Fermi LAT search for dark matter in gamma-ray lines and the inclusive photon spectrum
PHYSICAL REVIEW D
2012; 86 (2)
View details for DOI 10.1103/PhysRevD.86.022002
View details for Web of Science ID 000306193000001
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A STATISTICAL APPROACH TO RECOGNIZING SOURCE CLASSES FOR UNASSOCIATED SOURCES IN THE FIRST FERMI-LAT CATALOG
ASTROPHYSICAL JOURNAL
2012; 753 (1)
View details for DOI 10.1088/0004-637X/753/1/83
View details for Web of Science ID 000305632500083
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TESTING THE ORIGIN OF HIGH-ENERGY COSMIC RAYS
ASTROPHYSICAL JOURNAL
2012; 752 (1)
View details for DOI 10.1088/0004-637X/752/1/68
View details for Web of Science ID 000305463400068
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MULTI-WAVELENGTH OBSERVATIONS OF BLAZAR AO 0235+164 IN THE 2008-2009 FLARING STATE
ASTROPHYSICAL JOURNAL
2012; 751 (2)
View details for DOI 10.1088/0004-637X/751/2/159
View details for Web of Science ID 000304204600080
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Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT (vol 85, 083007, 2012)
PHYSICAL REVIEW D
2012; 85 (10)
View details for DOI 10.1103/PhysRevD.85.109901
View details for Web of Science ID 000304067000007
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CHARACTERIZING COSMIC-RAY PROPAGATION IN MASSIVE STAR-FORMING REGIONS: THE CASE OF 30 DORADUS AND THE LARGE MAGELLANIC CLOUD
ASTROPHYSICAL JOURNAL
2012; 750 (2)
View details for DOI 10.1088/0004-637X/750/2/126
View details for Web of Science ID 000303446500040
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FERMI-LAT OBSERVATIONS OF THE DIFFUSE gamma-RAY EMISSION: IMPLICATIONS FORCOSMIC RAYS AND THE INTERSTELLAR MEDIUM
ASTROPHYSICAL JOURNAL
2012; 750 (1)
View details for DOI 10.1088/0004-637X/750/1/3
View details for Web of Science ID 000303063500003
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Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT
PHYSICAL REVIEW D
2012; 85 (8)
View details for DOI 10.1103/PhysRevD.85.083007
View details for Web of Science ID 000303170000001
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FERMI LARGE AREA TELESCOPE SECOND SOURCE CATALOG
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2012; 199 (2)
View details for DOI 10.1088/0067-0049/199/2/31
View details for Web of Science ID 000303105400007
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FERMI DETECTION OF gamma-RAY EMISSION FROM THE M2 SOFT X-RAY FLARE ON 2010 JUNE 12 (vol 745, pg 144,2012)
ASTROPHYSICAL JOURNAL
2012; 748 (2)
View details for DOI 10.1088/0004-637X/748/2/151
View details for Web of Science ID 000302135200079
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SEARCH FOR DARK MATTER SATELLITES USING FERMI-LAT
ASTROPHYSICAL JOURNAL
2012; 747 (2)
View details for DOI 10.1088/0004-637X/747/2/121
View details for Web of Science ID 000302856400037
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SEARCH FOR GAMMA-RAY EMISSION FROM X-RAY-SELECTED SEYFERT GALAXIES WITH FERMI-LAT
ASTROPHYSICAL JOURNAL
2012; 747 (2)
View details for DOI 10.1088/0004-637X/747/2/104
View details for Web of Science ID 000302856400020
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Limits on large extra dimensions based on observations of neutron stars with the Fermi-LAT
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2012
View details for DOI 10.1088/1475-7516/2012/02/012
View details for Web of Science ID 000301176000013
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The cosmic-ray and gas content of the Cygnus region as measured in gamma-rays by the Fermi Large Area Telescope
ASTRONOMY & ASTROPHYSICS
2012; 538
View details for DOI 10.1051/0004-6361/201117539
View details for Web of Science ID 000300614100071
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FERMI DETECTION OF gamma-RAY EMISSION FROM THE M2 SOFT X-RAY FLARE ON 2010 JUNE 12f
ASTROPHYSICAL JOURNAL
2012; 745 (2)
View details for DOI 10.1088/0004-637X/745/2/144
View details for Web of Science ID 000300326800042
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Periodic Emission from the Gamma-Ray Binary 1FGL J1018.6-5856
SCIENCE
2012; 335 (6065): 189-193
Abstract
Gamma-ray binaries are stellar systems containing a neutron star or black hole, with gamma-ray emission produced by an interaction between the components. These systems are rare, even though binary evolution models predict dozens in our Galaxy. A search for gamma-ray binaries with the Fermi Large Area Telescope (LAT) shows that 1FGL J1018.6-5856 exhibits intensity and spectral modulation with a 16.6-day period. We identified a variable x-ray counterpart, which shows a sharp maximum coinciding with maximum gamma-ray emission, as well as an O6V((f)) star optical counterpart and a radio counterpart that is also apparently modulated on the orbital period. 1FGL J1018.6-5856 is thus a gamma-ray binary, and its detection suggests the presence of other fainter binaries in the Galaxy.
View details for DOI 10.1126/science.1213974
View details for PubMedID 22246769
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Measurement of Separate Cosmic-Ray Electron and Positron Spectra with the Fermi Large Area Telescope
PHYSICAL REVIEW LETTERS
2012; 108 (1)
Abstract
We measured separate cosmic-ray electron and positron spectra with the Fermi Large Area Telescope. Because the instrument does not have an onboard magnet, we distinguish the two species by exploiting Earth's shadow, which is offset in opposite directions for opposite charges due to Earth's magnetic field. We estimate and subtract the cosmic-ray proton background using two different methods that produce consistent results. We report the electron-only spectrum, the positron-only spectrum, and the positron fraction between 20 and 200 GeV. We confirm that the fraction rises with energy in the 20-100 GeV range. The three new spectral points between 100 and 200 GeV are consistent with a fraction that is continuing to rise with energy.
View details for DOI 10.1103/PhysRevLett.108.011103
View details for Web of Science ID 000298928500005
View details for PubMedID 22304252
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE SUPERNOVA REMNANT G8.7-0.1
ASTROPHYSICAL JOURNAL
2012; 744 (1)
View details for DOI 10.1088/0004-637X/744/1/80
View details for Web of Science ID 000298408300080
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In-flight measurement of the absolute energy scale of the Fermi Large Area Telescope
ASTROPARTICLE PHYSICS
2012; 35 (6): 346-353
View details for DOI 10.1016/j.astropartphys.2011.10.007
View details for Web of Science ID 000300760800007
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THE SECOND CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2011; 743 (2)
View details for DOI 10.1088/0004-637X/743/2/171
View details for Web of Science ID 000298178400073
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Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
PHYSICAL REVIEW LETTERS
2011; 107 (24)
Abstract
Satellite galaxies of the Milky Way are among the most promising targets for dark matter searches in gamma rays. We present a search for dark matter consisting of weakly interacting massive particles, applying a joint likelihood analysis to 10 satellite galaxies with 24 months of data of the Fermi Large Area Telescope. No dark matter signal is detected. Including the uncertainty in the dark matter distribution, robust upper limits are placed on dark matter annihilation cross sections. The 95% confidence level upper limits range from about 10(-26) cm3 s(-1) at 5 GeV to about 5×10(-23) cm3 s(-1) at 1 TeV, depending on the dark matter annihilation final state. For the first time, using gamma rays, we are able to rule out models with the most generic cross section (∼3×10(-26) cm3 s(-1) for a purely s-wave cross section), without assuming additional boost factors.
View details for DOI 10.1103/PhysRevLett.107.241302
View details for PubMedID 22242987
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Fermi Detection of a Luminous gamma-Ray Pulsar in a Globular Cluster
SCIENCE
2011; 334 (6059): 1107-1110
View details for DOI 10.1126/science.1207141
View details for Web of Science ID 000297313900043
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A Cocoon of Freshly Accelerated Cosmic Rays Detected by Fermi in the Cygnus Superbubble
SCIENCE
2011; 334 (6059): 1103-1107
Abstract
The origin of Galactic cosmic rays is a century-long puzzle. Indirect evidence points to their acceleration by supernova shockwaves, but we know little of their escape from the shock and their evolution through the turbulent medium surrounding massive stars. Gamma rays can probe their spreading through the ambient gas and radiation fields. The Fermi Large Area Telescope (LAT) has observed the star-forming region of Cygnus X. The 1- to 100-gigaelectronvolt images reveal a 50-parsec-wide cocoon of freshly accelerated cosmic rays that flood the cavities carved by the stellar winds and ionization fronts from young stellar clusters. It provides an example to study the youth of cosmic rays in a superbubble environment before they merge into the older Galactic population.
View details for DOI 10.1126/science.1210311
View details for PubMedID 22116880
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gamma-RAY AND PARSEC-SCALE JET PROPERTIES OF A COMPLETE SAMPLE OF BLAZARS FROM THE MOJAVE PROGRAM
ASTROPHYSICAL JOURNAL
2011; 742 (1)
View details for DOI 10.1088/0004-637X/742/1/27
View details for Web of Science ID 000296783400027
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THE RADIO/GAMMA-RAY CONNECTION IN ACTIVE GALACTIC NUCLEI IN THE ERA OF THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2011; 741 (1)
View details for DOI 10.1088/0004-637X/741/1/30
View details for Web of Science ID 000296769000030
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The 511 keV emission from positron annihilation in the Galaxy
REVIEWS OF MODERN PHYSICS
2011; 83 (3): 1001–56
View details for DOI 10.1103/RevModPhys.83.1001
View details for Web of Science ID 000297197100001
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DIFFUSE EMISSION MEASUREMENT WITH THE SPECTROMETER ON INTEGRAL AS AN INDIRECT PROBE OF COSMIC-RAY ELECTRONS AND POSITRONS
ASTROPHYSICAL JOURNAL
2011; 739 (1)
View details for DOI 10.1088/0004-637X/739/1/29
View details for Web of Science ID 000294955700029
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Simultaneous multi-wavelength campaign on PKS 2005-489 in a high state
ASTRONOMY & ASTROPHYSICS
2011; 533
View details for DOI 10.1051/0004-6361/201016170
View details for Web of Science ID 000295168100110
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Constraints on dark matter models from a Fermi LAT search for high-energy cosmic-ray electrons from the Sun
PHYSICAL REVIEW D
2011; 84 (3)
View details for DOI 10.1103/PhysRevD.84.032007
View details for Web of Science ID 000293844100001
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF MARKARIAN 421: THE MISSING PIECE OF ITS SPECTRAL ENERGY DISTRIBUTION
ASTROPHYSICAL JOURNAL
2011; 736 (2)
View details for DOI 10.1088/0004-637X/736/2/131
View details for Web of Science ID 000292977400056
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DISCOVERY OF HIGH-ENERGY GAMMA-RAY EMISSION FROM THE BINARY SYSTEM PSR B1259-63/LS 2883 AROUND PERIASTRON WITH FERMI
ASTROPHYSICAL JOURNAL LETTERS
2011; 736 (1)
View details for DOI 10.1088/2041-8205/736/1/L11
View details for Web of Science ID 000293138300011
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DETECTION OF HIGH-ENERGY GAMMA-RAY EMISSION DURING THE X-RAY FLARING ACTIVITY IN GRB 100728A
ASTROPHYSICAL JOURNAL LETTERS
2011; 734 (2)
View details for DOI 10.1088/2041-8205/734/2/L27
View details for Web of Science ID 000293135700002
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF TWO GAMMA-RAY EMISSION COMPONENTS FROM THE QUIESCENT SUN
ASTROPHYSICAL JOURNAL
2011; 734 (2)
View details for DOI 10.1088/0004-637X/734/2/116
View details for Web of Science ID 000291386500044
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OBSERVATIONS OF THE YOUNG SUPERNOVA REMNANT RX J1713.7-3946 WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2011; 734 (1)
View details for DOI 10.1088/0004-637X/734/1/28
View details for Web of Science ID 000291026900028
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GALPROP WebRun: An internet-based service for calculating galactic cosmic ray propagation and associated photon emissions
COMPUTER PHYSICS COMMUNICATIONS
2011; 182 (5): 1156-1161
View details for DOI 10.1016/j.cpc.2011.01.017
View details for Web of Science ID 000288926100007
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MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING GAMMA-RAY BLAZAR 3C 66A IN 2008 OCTOBER (vol 726, pg 43, 2011)
ASTROPHYSICAL JOURNAL
2011; 731 (1)
View details for DOI 10.1088/0004-637X/731/1/77
View details for Web of Science ID 000289772800077
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THE FIRST FERMI MULTIFREQUENCY CAMPAIGN ON BL LACERTAE: CHARACTERIZING THE LOW-ACTIVITY STATE OF THE EPONYMOUS BLAZAR
ASTROPHYSICAL JOURNAL
2011; 730 (2)
View details for DOI 10.1088/0004-637X/730/2/101
View details for Web of Science ID 000288441900041
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DETECTION OF A SPECTRAL BREAK IN THE EXTRA HARD COMPONENT OF GRB 090926A
ASTROPHYSICAL JOURNAL
2011; 729 (2)
View details for DOI 10.1088/0004-637X/729/2/114
View details for Web of Science ID 000288608700037
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CONSTRAINTS ON COSMIC-RAY PROPAGATION MODELS FROM A GLOBAL BAYESIAN ANALYSIS
ASTROPHYSICAL JOURNAL
2011; 729 (2)
View details for DOI 10.1088/0004-637X/729/2/106
View details for Web of Science ID 000288608700029
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THE FIRST FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS (vol 187, pg 460, 2010)
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2011; 193 (1)
View details for DOI 10.1088/0067-0049/193/1/22
View details for Web of Science ID 000289059000022
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RADIO AND gamma-RAY CONSTRAINTS ON THE EMISSION GEOMETRY AND BIRTHPLACE OF PSR J2043+2740
ASTROPHYSICAL JOURNAL
2011; 728 (2)
View details for DOI 10.1088/0004-637X/728/2/77
View details for Web of Science ID 000286973600004
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Gamma-Ray Flares from the Crab Nebula
SCIENCE
2011; 331 (6018): 739-742
Abstract
A young and energetic pulsar powers the well-known Crab Nebula. Here, we describe two separate gamma-ray (photon energy greater than 100 mega-electron volts) flares from this source detected by the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. The first flare occurred in February 2009 and lasted approximately 16 days. The second flare was detected in September 2010 and lasted approximately 4 days. During these outbursts, the gamma-ray flux from the nebula increased by factors of four and six, respectively. The brevity of the flares implies that the gamma rays were emitted via synchrotron radiation from peta-electron-volt (10(15) electron volts) electrons in a region smaller than 1.4 × 10(-2) parsecs. These are the highest-energy particles that can be associated with a discrete astronomical source, and they pose challenges to particle acceleration theory.
View details for DOI 10.1126/science.1199705
View details for Web of Science ID 000287205700062
View details for PubMedID 21212321
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INSIGHTS INTO THE HIGH-ENERGY gamma-RAY EMISSION OF MARKARIAN 501 FROM EXTENSIVE MULTIFREQUENCY OBSERVATIONS IN THE FERMI ERA
ASTROPHYSICAL JOURNAL
2011; 727 (2)
View details for DOI 10.1088/0004-637X/727/2/129
View details for Web of Science ID 000286662000068
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CONSTRAINTS ON THE COSMIC-RAY DENSITY GRADIENT BEYOND THE SOLAR CIRCLE FROM FERMI gamma-RAY OBSERVATIONS OF THE THIRD GALACTIC QUADRANT
ASTROPHYSICAL JOURNAL
2011; 726 (2)
View details for DOI 10.1088/0004-637X/726/2/81
View details for Web of Science ID 000285623600025
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MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING GAMMA-RAY BLAZAR 3C 66A IN 2008 OCTOBER
ASTROPHYSICAL JOURNAL
2011; 726 (1)
View details for DOI 10.1088/0004-637X/726/1/43
View details for Web of Science ID 000285411300043
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FERMI-LAT SEARCH FOR PULSAR WIND NEBULAE AROUND GAMMA-RAY PULSARS
ASTROPHYSICAL JOURNAL
2011; 726 (1)
View details for DOI 10.1088/0004-637X/726/1/35
View details for Web of Science ID 000285411300035
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SEARCH FOR GAMMA-RAY EMISSION FROM MAGNETARS WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL LETTERS
2010; 725 (1): L73-L78
View details for DOI 10.1088/2041-8205/725/1/L73
View details for Web of Science ID 000284575400016
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A population of gamma-ray emitting globular clusters seen with the Fermi Large Area Telescope
ASTRONOMY & ASTROPHYSICS
2010; 524
View details for DOI 10.1051/0004-6361/201014458
View details for Web of Science ID 000284625300024
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Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV
PHYSICAL REVIEW D
2010; 82 (9)
View details for DOI 10.1103/PhysRevD.82.092004
View details for Web of Science ID 000284402000002
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Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope
PHYSICAL REVIEW D
2010; 82 (9)
View details for DOI 10.1103/PhysRevD.82.092003
View details for Web of Science ID 000284402000001
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FERMI LARGE AREA TELESCOPE CONSTRAINTS ON THE GAMMA-RAY OPACITY OF THE UNIVERSE
ASTROPHYSICAL JOURNAL
2010; 723 (2): 1082-1096
View details for DOI 10.1088/0004-637X/723/2/1082
View details for Web of Science ID 000284093700011
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FERMI LARGE AREA TELESCOPE OBSERVATION OF A GAMMA-RAY SOURCE AT THE POSITION OF ETA CARINAE
ASTROPHYSICAL JOURNAL
2010; 723 (1): 649-657
View details for DOI 10.1088/0004-637X/723/1/649
View details for Web of Science ID 000284090100057
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Detection of the Small Magellanic Cloud in gamma-rays with Fermi/LAT
ASTRONOMY & ASTROPHYSICS
2010; 523
View details for DOI 10.1051/0004-6361/201014855
View details for Web of Science ID 000285346600050
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Fermi Large Area Telescope observations of Local Group galaxies: detection of M31 and search for M33
ASTRONOMY & ASTROPHYSICS
2010; 523
View details for DOI 10.1051/0004-6361/201015759
View details for Web of Science ID 000285346600003
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FERMI-LAT STUDY OF GAMMA-RAY EMISSION IN THE DIRECTION OF SUPERNOVA REMNANT W49B
ASTROPHYSICAL JOURNAL
2010; 722 (2): 1303-1311
View details for DOI 10.1088/0004-637X/722/2/1303
View details for Web of Science ID 000284075400026
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GAMMA-RAY LIGHT CURVES AND VARIABILITY OF BRIGHT FERMI-DETECTED BLAZARS
ASTROPHYSICAL JOURNAL
2010; 722 (1): 520-542
View details for DOI 10.1088/0004-637X/722/1/520
View details for Web of Science ID 000282908900043
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GLOBAL COSMIC-RAY-RELATED LUMINOSITY AND ENERGY BUDGET OF THE MILKY WAY
ASTROPHYSICAL JOURNAL LETTERS
2010; 722 (1): L58-L63
View details for DOI 10.1088/2041-8205/722/1/L58
View details for Web of Science ID 000282192300012
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FERMI LARGE AREA TELESCOPE AND MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING ACTIVITY OF PKS 1510-089 BETWEEN 2008 SEPTEMBER AND 2009 JUNE
ASTROPHYSICAL JOURNAL
2010; 721 (2): 1425-1447
View details for DOI 10.1088/0004-637X/721/2/1425
View details for Web of Science ID 000282193600041
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FERMI GAMMA-RAY SPACE TELESCOPE OBSERVATIONS OF GAMMA-RAY OUTBURSTS FROM 3C 454.3 IN 2009 DECEMBER AND 2010 APRIL
ASTROPHYSICAL JOURNAL
2010; 721 (2): 1383-1396
View details for DOI 10.1088/0004-637X/721/2/1383
View details for Web of Science ID 000282193600036
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF MISALIGNED ACTIVE GALACTIC NUCLEI
ASTROPHYSICAL JOURNAL
2010; 720 (1): 912-922
View details for DOI 10.1088/0004-637X/720/1/912
View details for Web of Science ID 000281596000077
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF GAMMA-RAY PULSARS PSR J1057-5226, J1709-4429, AND J1952+3252
ASTROPHYSICAL JOURNAL
2010; 720 (1): 26-40
View details for DOI 10.1088/0004-637X/720/1/26
View details for Web of Science ID 000281596000004
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FERMI-LAT OBSERVATIONS OF THE GEMINGA PULSAR
ASTROPHYSICAL JOURNAL
2010; 720 (1): 272-283
View details for DOI 10.1088/0004-637X/720/1/272
View details for Web of Science ID 000281596000025
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THE FERMI-LAT HIGH-LATITUDE SURVEY: SOURCE COUNT DISTRIBUTIONS AND THE ORIGIN OF THE EXTRAGALACTIC DIFFUSE BACKGROUND
ASTROPHYSICAL JOURNAL
2010; 720 (1): 435-453
View details for DOI 10.1088/0004-637X/720/1/435
View details for Web of Science ID 000281596000037
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FERMI LARGE AREA TELESCOPE VIEW OF THE CORE OF THE RADIO GALAXY CENTAURUS A
ASTROPHYSICAL JOURNAL
2010; 719 (2): 1433-1444
View details for DOI 10.1088/0004-637X/719/2/1433
View details for Web of Science ID 000280658000033
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Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407 Cygni
SCIENCE
2010; 329 (5993): 817-821
Abstract
Novae are thermonuclear explosions on a white dwarf surface fueled by mass accreted from a companion star. Current physical models posit that shocked expanding gas from the nova shell can produce x-ray emission, but emission at higher energies has not been widely expected. Here, we report the Fermi Large Area Telescope detection of variable gamma-ray emission (0.1 to 10 billion electron volts) from the recently detected optical nova of the symbiotic star V407 Cygni. We propose that the material of the nova shell interacts with the dense ambient medium of the red giant primary and that particles can be accelerated effectively to produce pi(0) decay gamma-rays from proton-proton interactions. Emission involving inverse Compton scattering of the red giant radiation is also considered and is not ruled out.
View details for DOI 10.1126/science.1192537
View details for Web of Science ID 000280809900044
View details for PubMedID 20705855
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE SUPERNOVA REMNANT W28 (G6.4-0.1)
ASTROPHYSICAL JOURNAL
2010; 718 (1): 348-356
View details for DOI 10.1088/0004-637X/718/1/348
View details for Web of Science ID 000280340800029
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FERMI OBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 090217A
ASTROPHYSICAL JOURNAL LETTERS
2010; 717 (2): L127-L132
View details for DOI 10.1088/2041-8205/717/2/L127
View details for Web of Science ID 000279430700011
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GeV GAMMA-RAY FLUX UPPER LIMITS FROM CLUSTERS OF GALAXIES
ASTROPHYSICAL JOURNAL LETTERS
2010; 717 (1): L71-L78
View details for DOI 10.1088/2041-8205/717/1/L71
View details for Web of Science ID 000279430600015
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FERMI OBSERVATIONS OF GRB 090510: A SHORT-HARD GAMMA-RAY BURST WITH AN ADDITIONAL, HARD POWER-LAW COMPONENT FROM 10 keV TO GeV ENERGIES
ASTROPHYSICAL JOURNAL
2010; 716 (2): 1178-1190
View details for DOI 10.1088/0004-637X/716/2/1178
View details for Web of Science ID 000278459000022
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SUZAKU OBSERVATIONS OF LUMINOUS QUASARS: REVEALING THE NATURE OF HIGH-ENERGY BLAZAR EMISSION IN LOW-LEVEL ACTIVITY STATES
ASTROPHYSICAL JOURNAL
2010; 716 (1): 835-849
View details for DOI 10.1088/0004-637X/716/1/835
View details for Web of Science ID 000277960000064
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THE SPECTRAL ENERGY DISTRIBUTION OF FERMI BRIGHT BLAZARS
ASTROPHYSICAL JOURNAL
2010; 716 (1): 30-70
View details for DOI 10.1088/0004-637X/716/1/30
View details for Web of Science ID 000277960000002
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FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2010; 188 (2): 405-436
View details for DOI 10.1088/0067-0049/188/2/405
View details for Web of Science ID 000278969400004
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THE DISCOVERY OF gamma-RAY EMISSION FROM THE BLAZAR RGB J0710+591
ASTROPHYSICAL JOURNAL LETTERS
2010; 715 (1): L49-L55
View details for DOI 10.1088/2041-8205/715/1/L49
View details for Web of Science ID 000277233200011
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THE FIRST CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2010; 715 (1): 429-457
View details for DOI 10.1088/0004-637X/715/1/429
View details for Web of Science ID 000277216100036
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Fermi Gamma-Ray Imaging of a Radio Galaxy
SCIENCE
2010; 328 (5979): 725-729
Abstract
The Fermi Gamma-ray Space Telescope has detected the gamma-ray glow emanating from the giant radio lobes of the radio galaxy Centaurus A. The resolved gamma-ray image shows the lobes clearly separated from the central active source. In contrast to all other active galaxies detected so far in high-energy gamma-rays, the lobe flux constitutes a considerable portion (greater than one-half) of the total source emission. The gamma-ray emission from the lobes is interpreted as inverse Compton-scattered relic radiation from the cosmic microwave background, with additional contribution at higher energies from the infrared-to-optical extragalactic background light. These measurements provide gamma-ray constraints on the magnetic field and particle energy content in radio galaxy lobes, as well as a promising method to probe the cosmic relic photon fields.
View details for DOI 10.1126/science.1184656
View details for Web of Science ID 000277357100032
View details for PubMedID 20360067
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DETECTION OF THE ENERGETIC PULSAR PSR B1509-58 AND ITS PULSAR WIND NEBULA IN MSH 15-52 USING THE FERMI-LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2010; 714 (1): 927-936
View details for DOI 10.1088/0004-637X/714/1/927
View details for Web of Science ID 000276701000076
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FERMI-LARGE AREA TELESCOPE OBSERVATIONS OF THE EXCEPTIONAL GAMMA-RAY OUTBURSTS OF 3C 273 IN 2009 SEPTEMBER
ASTROPHYSICAL JOURNAL LETTERS
2010; 714 (1): L73-L78
View details for DOI 10.1088/2041-8205/714/1/L73
View details for Web of Science ID 000276971300015
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Constraints on dark matter annihilation in clusters of galaxies with the Fermi large area telescope
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2010
View details for DOI 10.1088/1475-7516/2010/05/025
View details for Web of Science ID 000279490800015
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THE VELA PULSAR: RESULTS FROM THE FIRST YEAR OF FERMI LAT OBSERVATIONS
ASTROPHYSICAL JOURNAL
2010; 713 (1): 154-165
View details for DOI 10.1088/0004-637X/713/1/154
View details for Web of Science ID 000275918500014
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE VELA-X PULSAR WIND NEBULA
ASTROPHYSICAL JOURNAL
2010; 713 (1): 146-153
View details for DOI 10.1088/0004-637X/713/1/146
View details for Web of Science ID 000275918500013
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Constraints on cosmological dark matter annihilation from the Fermi-LAT isotropic diffuse gamma-ray measurement
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2010
View details for DOI 10.1088/1475-7516/2010/04/014
View details for Web of Science ID 000277684600019
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DISCOVERY OF PULSED gamma-RAYS FROM PSR J0034-0534 WITH THE FERMI LARGE AREA TELESCOPE: A CASE FOR CO-LOCATED RADIO AND gamma-RAY EMISSION REGIONS
ASTROPHYSICAL JOURNAL
2010; 712 (2): 957-963
View details for DOI 10.1088/0004-637X/712/2/957
View details for Web of Science ID 000275594600016
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF PSR J1836+5925
ASTROPHYSICAL JOURNAL
2010; 712 (2): 1209-1218
View details for DOI 10.1088/0004-637X/712/2/1209
View details for Web of Science ID 000275594600037
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THE FIRST FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2010; 187 (2): 460-494
View details for DOI 10.1088/0067-0049/187/2/460
View details for Web of Science ID 000276841500007
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FERMI DETECTION DELAYED GeV EMISSION FROM THE SHORT GAMMA-RAY BURST 081024B
ASTROPHYSICAL JOURNAL
2010; 712 (1): 558-564
View details for DOI 10.1088/0004-637X/712/1/558
View details for Web of Science ID 000275222900049
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OBSERVATIONS OF MILKY WAY DWARF SPHEROIDAL GALAXIES WITH THE FERMI-LARGE AREA TELESCOPE DETECTOR AND CONSTRAINTS ON DARK MATTER MODELS
ASTROPHYSICAL JOURNAL
2010; 712 (1): 147-158
View details for DOI 10.1088/0004-637X/712/1/147
View details for Web of Science ID 000275222900013
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OBSERVATION OF SUPERNOVA REMNANT IC 443 WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2010; 712 (1): 459-468
View details for DOI 10.1088/0004-637X/712/1/459
View details for Web of Science ID 000275222900041
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Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived from First-Year Fermi Large Area Telescope Data
PHYSICAL REVIEW LETTERS
2010; 104 (10)
Abstract
We report on the first Fermi Large Area Telescope (LAT) measurements of the so-called "extragalactic" diffuse gamma-ray emission (EGB). This component of the diffuse gamma-ray emission is generally considered to have an isotropic or nearly isotropic distribution on the sky with diverse contributions discussed in the literature. The derivation of the EGB is based on detailed modeling of the bright foreground diffuse Galactic gamma-ray emission, the detected LAT sources, and the solar gamma-ray emission. We find the spectrum of the EGB is consistent with a power law with a differential spectral index gamma = 2.41 +/- 0.05 and intensity I(>100 MeV) = (1.03 +/- 0.17) x 10(-5) cm(-2) s(-1) sr(-1), where the error is systematics dominated. Our EGB spectrum is featureless, less intense, and softer than that derived from EGRET data.
View details for DOI 10.1103/PhysRevLett.104.101101
View details for Web of Science ID 000275543500007
View details for PubMedID 20366411
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Fermi Large Area Telescope Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications
PHYSICAL REVIEW LETTERS
2010; 104 (9)
Abstract
Dark matter (DM) particle annihilation or decay can produce monochromatic gamma rays readily distinguishable from astrophysical sources. gamma-ray line limits from 30 to 200 GeV obtained from 11 months of Fermi Large Area Space Telescope data from 20-300 GeV are presented using a selection based on requirements for a gamma-ray line analysis, and integrated over most of the sky. We obtain gamma-ray line flux upper limits in the range 0.6-4.5x10{-9} cm{-2} s{-1}, and give corresponding DM annihilation cross-section and decay lifetime limits. Theoretical implications are briefly discussed.
View details for DOI 10.1103/PhysRevLett.104.091302
View details for Web of Science ID 000275252500009
View details for PubMedID 20366979
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PSR J1907+0602: A RADIO-FAINT GAMMA-RAY PULSAR POWERING A BRIGHT TeV PULSAR WIND NEBULA
ASTROPHYSICAL JOURNAL
2010; 711 (1): 64-74
View details for DOI 10.1088/0004-637X/711/1/64
View details for Web of Science ID 000274417500006
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Observations of the Large Magellanic Cloud with Fermi
ASTRONOMY & ASTROPHYSICS
2010; 512
View details for DOI 10.1051/0004-6361/200913474
View details for Web of Science ID 000276245500019
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Gamma-Ray Emission from the Shell of Supernova Remnant W44 Revealed by the Fermi LAT
SCIENCE
2010; 327 (5969): 1103-1106
Abstract
Recent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close to ~10(15) electron volts. However, the nature of the particles that produce the emission remains ambiguous. We report observations of SNR W44 with the Fermi Large Area Telescope at energies between 2 x 10(8) electron volts and 3 x10(11) electron volts. The detection of a source with a morphology corresponding to the SNR shell implies that the emission is produced by particles accelerated there. The gamma-ray spectrum is well modeled with emission from protons and nuclei. Its steepening above approximately 10(9) electron volts provides a probe with which to study how particle acceleration responds to environmental effects such as shock propagation in dense clouds and how accelerated particles are released into interstellar space.
View details for DOI 10.1126/science.1182787
View details for Web of Science ID 000274901100028
View details for PubMedID 20056857
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SPECTRAL PROPERTIES OF BRIGHT FERMI-DETECTED BLAZARS IN THE GAMMA-RAY BAND
ASTROPHYSICAL JOURNAL
2010; 710 (2): 1271-1285
View details for DOI 10.1088/0004-637X/710/2/1271
View details for Web of Science ID 000274233300027
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A change in the optical polarization associated with a gamma-ray flare in the blazar 3C 279
NATURE
2010; 463 (7283): 919-923
Abstract
It is widely accepted that strong and variable radiation detected over all accessible energy bands in a number of active galaxies arises from a relativistic, Doppler-boosted jet pointing close to our line of sight. The size of the emitting zone and the location of this region relative to the central supermassive black hole are, however, poorly known, with estimates ranging from light-hours to a light-year or more. Here we report the coincidence of a gamma (gamma)-ray flare with a dramatic change of optical polarization angle. This provides evidence for co-spatiality of optical and gamma-ray emission regions and indicates a highly ordered jet magnetic field. The results also require a non-axisymmetric structure of the emission zone, implying a curved trajectory for the emitting material within the jet, with the dissipation region located at a considerable distance from the black hole, at about 10(5) gravitational radii.
View details for DOI 10.1038/nature08841
View details for Web of Science ID 000274582700039
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FERMI-LAT DISCOVERY OF GeV GAMMA-RAY EMISSION FROM THE YOUNG SUPERNOVA REMNANT CASSIOPEIA A
ASTROPHYSICAL JOURNAL LETTERS
2010; 710 (1): L92-L97
View details for DOI 10.1088/2041-8205/710/1/L92
View details for Web of Science ID 000274438700020
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FERMI OBSERVATIONS OF CASSIOPEIA AND CEPHEUS: DIFFUSE GAMMA-RAY EMISSION IN THE OUTER GALAXY
ASTROPHYSICAL JOURNAL
2010; 710 (1): 133-149
View details for DOI 10.1088/0004-637X/710/1/133
View details for Web of Science ID 000273850800015
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PKS 1502+106: A NEW AND DISTANT GAMMA-RAY BLAZAR IN OUTBURST DISCOVERED BY THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2010; 710 (1): 810-827
View details for DOI 10.1088/0004-637X/710/1/810
View details for Web of Science ID 000273850800063
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DETECTION OF GAMMA-RAY EMISSION FROM THE STARBURST GALAXIES M82 AND NGC 253 WITH THE LARGE AREA TELESCOPE ON FERMI
ASTROPHYSICAL JOURNAL LETTERS
2010; 709 (2): L152-L157
View details for DOI 10.1088/2041-8205/709/2/L152
View details for Web of Science ID 000274209300013
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SWIFT AND FERMI OBSERVATIONS OF THE EARLY AFTERGLOW OF THE SHORT GAMMA-RAY BURST 090510
ASTROPHYSICAL JOURNAL LETTERS
2010; 709 (2): L146-L151
View details for DOI 10.1088/2041-8205/709/2/L146
View details for Web of Science ID 000274209300012
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DISCOVERY OF VERY HIGH ENERGY GAMMA RAYS FROM PKS 1424+240 AND MULTIWAVELENGTH CONSTRAINTS ON ITS REDSHIFT
ASTROPHYSICAL JOURNAL LETTERS
2010; 708 (2): L100-L106
View details for DOI 10.1088/2041-8205/708/2/L100
View details for Web of Science ID 000273308000007
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE CRAB PULSAR AND NEBULA
ASTROPHYSICAL JOURNAL
2010; 708 (2): 1254-1267
View details for DOI 10.1088/0004-637X/708/2/1254
View details for Web of Science ID 000273021000024
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FERMI OBSERVATIONS OF THE VERY HARD GAMMA-RAY BLAZAR PG 1553+113
ASTROPHYSICAL JOURNAL
2010; 708 (2): 1310-1320
View details for DOI 10.1088/0004-637X/708/2/1310
View details for Web of Science ID 000273021000028
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GAMMA-RAY AND RADIO PROPERTIES OF SIX PULSARS DETECTED BY THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2010; 708 (2): 1426-1441
View details for DOI 10.1088/0004-637X/708/2/1426
View details for Web of Science ID 000273021000038
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RADIO-LOUD NARROW-LINE SEYFERT 1 AS A NEW CLASS OF GAMMA-RAY ACTIVE GALACTIC NUCLEI
ASTROPHYSICAL JOURNAL LETTERS
2009; 707 (2): L142-L147
View details for DOI 10.1088/0004-637X/707/2/L142
View details for Web of Science ID 000272465800008
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FERMI OBSERVATIONS OF TeV-SELECTED ACTIVE GALACTIC NUCLEI
ASTROPHYSICAL JOURNAL
2009; 707 (2): 1310-1333
View details for DOI 10.1088/0004-637X/707/2/1310
View details for Web of Science ID 000272465400039
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Fermi Large Area Telescope Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes
PHYSICAL REVIEW LETTERS
2009; 103 (25)
Abstract
The diffuse galactic gamma-ray emission is produced by cosmic rays (CRs) interacting with the interstellar gas and radiation field. Measurements by the Energetic Gamma-Ray Experiment Telescope (EGRET) instrument on the Compton Gamma-Ray Observatory indicated excess gamma-ray emission greater, > or approximately equal to 1 GeV relative to diffuse galactic gamma-ray emission models consistent with directly measured CR spectra (the so-called "EGRET GeV excess"). The Large Area Telescope (LAT) instrument on the Fermi Gamma-Ray Space Telescope has measured the diffuse gamma-ray emission with improved sensitivity and resolution compared to EGRET. We report on LAT measurements for energies 100 MeV to 10 GeV and galactic latitudes 10 degrees < or = |b| < or = 20 degrees. The LAT spectrum for this region of the sky is well reproduced by a diffuse galactic gamma-ray emission model that is consistent with local CR spectra and inconsistent with the EGRET GeV excess.
View details for DOI 10.1103/PhysRevLett.103.251101
View details for Web of Science ID 000272958300005
View details for PubMedID 20366246
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Modulated High-Energy Gamma-Ray Emission from the Microquasar Cygnus X-3
SCIENCE
2009; 326 (5959): 1512-1516
Abstract
Microquasars are accreting black holes or neutron stars in binary systems with associated relativistic jets. Despite their frequent outburst activity, they have never been unambiguously detected emitting high-energy gamma rays. The Fermi Large Area Telescope (LAT) has detected a variable high-energy source coinciding with the position of the x-ray binary and microquasar Cygnus X-3. Its identification with Cygnus X-3 is secured by the detection of its orbital period in gamma rays, as well as the correlation of the LAT flux with radio emission from the relativistic jets of Cygnus X-3. The gamma-ray emission probably originates from within the binary system, opening new areas in which to study the formation of relativistic jets.
View details for DOI 10.1126/science.1182174
View details for Web of Science ID 000272623600051
View details for PubMedID 19965378
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MULTIWAVELENGTH MONITORING OF THE ENIGMATIC NARROW-LINE SEYFERT 1 PMN J0948+0022 IN 2009 MARCH-JULY
ASTROPHYSICAL JOURNAL
2009; 707 (1): 727-737
View details for DOI 10.1088/0004-637X/707/1/727
View details for Web of Science ID 000272162900059
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FERMI LARGE AREA TELESCOPE GAMMA-RAY DETECTION OF THE RADIO GALAXY M87
ASTROPHYSICAL JOURNAL
2009; 707 (1): 55-60
View details for DOI 10.1088/0004-637X/707/1/55
View details for Web of Science ID 000272162900004
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FERMI OBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 080825C
ASTROPHYSICAL JOURNAL
2009; 707 (1): 580-592
View details for DOI 10.1088/0004-637X/707/1/580
View details for Web of Science ID 000272162900045
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Fermi large area telescope observations of the cosmic-ray induced gamma-ray emission of the Earth's atmosphere
PHYSICAL REVIEW D
2009; 80 (12)
View details for DOI 10.1103/PhysRevD.80.122004
View details for Web of Science ID 000273233300010
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FERMI LARGE AREA TELESCOPE DETECTION OF PULSED gamma-RAYS FROM THE VELA-LIKE PULSARS PSR J1048-5832 AND PSR J2229+6114
ASTROPHYSICAL JOURNAL
2009; 706 (2): 1331-1340
View details for DOI 10.1088/0004-637X/706/2/1331
View details for Web of Science ID 000271872900032
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FERMI OBSERVATIONS OF GRB 090902B: A DISTINCT SPECTRAL COMPONENT IN THE PROMPT AND DELAYED EMISSION
ASTROPHYSICAL JOURNAL LETTERS
2009; 706 (1): L138-L144
View details for DOI 10.1088/0004-637X/706/1/L138
View details for Web of Science ID 000271533200029
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FERMI LAT DISCOVERY OF EXTENDED GAMMA-RAY EMISSION IN THE DIRECTION OF SUPERNOVA REMNANT W51C
ASTROPHYSICAL JOURNAL LETTERS
2009; 706 (1): L1-L6
View details for DOI 10.1088/0004-637X/706/1/L1
View details for Web of Science ID 000271533200001
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FERMI/LAT OBSERVATIONS OF LS 5039
ASTROPHYSICAL JOURNAL LETTERS
2009; 706 (1): L56-L61
View details for DOI 10.1088/0004-637X/706/1/L56
View details for Web of Science ID 000271533200012
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A limit on the variation of the speed of light arising from quantum gravity effects
NATURE
2009; 462 (7271): 331-334
Abstract
A cornerstone of Einstein's special relativity is Lorentz invariance-the postulate that all observers measure exactly the same speed of light in vacuum, independent of photon-energy. While special relativity assumes that there is no fundamental length-scale associated with such invariance, there is a fundamental scale (the Planck scale, l(Planck) approximately 1.62 x 10(-33) cm or E(Planck) = M(Planck)c(2) approximately 1.22 x 10(19) GeV), at which quantum effects are expected to strongly affect the nature of space-time. There is great interest in the (not yet validated) idea that Lorentz invariance might break near the Planck scale. A key test of such violation of Lorentz invariance is a possible variation of photon speed with energy. Even a tiny variation in photon speed, when accumulated over cosmological light-travel times, may be revealed by observing sharp features in gamma-ray burst (GRB) light-curves. Here we report the detection of emission up to approximately 31 GeV from the distant and short GRB 090510. We find no evidence for the violation of Lorentz invariance, and place a lower limit of 1.2E(Planck) on the scale of a linear energy dependence (or an inverse wavelength dependence), subject to reasonable assumptions about the emission (equivalently we have an upper limit of l(Planck)/1.2 on the length scale of the effect). Our results disfavour quantum-gravity theories in which the quantum nature of space-time on a very small scale linearly alters the speed of light.
View details for DOI 10.1038/nature08574
View details for Web of Science ID 000271899300039
View details for PubMedID 19865083
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FERMI LAT OBSERVATION OF DIFFUSE GAMMA RAYS PRODUCED THROUGH INTERACTIONS BETWEEN LOCAL INTERSTELLAR MATTER AND HIGH-ENERGY COSMIC RAYS
ASTROPHYSICAL JOURNAL
2009; 703 (2): 1249-1256
View details for DOI 10.1088/0004-637X/703/2/1249
View details for Web of Science ID 000269929500007
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The on-orbit calibration of the Fermi Large Area Telescope
ASTROPARTICLE PHYSICS
2009; 32 (3-4): 193-219
View details for DOI 10.1016/j.astropartphys.2009.08.002
View details for Web of Science ID 000272276400005
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FERMI LAT OBSERVATIONS OF LS I+61 degrees 303: FIRST DETECTION OF AN ORBITAL MODULATION IN GeV GAMMA RAYS
ASTROPHYSICAL JOURNAL LETTERS
2009; 701 (2): L123-L128
View details for DOI 10.1088/0004-637X/701/2/L123
View details for Web of Science ID 000268867900014
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A Population of Gamma-Ray Millisecond Pulsars Seen with the Fermi Large Area Telescope
SCIENCE
2009; 325 (5942): 848-852
Abstract
Pulsars are born with subsecond spin periods and slow by electromagnetic braking for several tens of millions of years, when detectable radiation ceases. A second life can occur for neutron stars in binary systems. They can acquire mass and angular momentum from their companions, to be spun up to millisecond periods and begin radiating again. We searched Fermi Large Area Telescope data for pulsations from all known millisecond pulsars (MSPs) outside of globular clusters, using rotation parameters from radio telescopes. Strong gamma-ray pulsations were detected for eight MSPs. The gamma-ray pulse profiles and spectral properties resemble those of young gamma-ray pulsars. The basic emission mechanism seems to be the same for MSPs and young pulsars, with the emission originating in regions far from the neutron star surface.
View details for DOI 10.1126/science.1176113
View details for Web of Science ID 000269242400039
View details for PubMedID 19574349
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Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT
SCIENCE
2009; 325 (5942): 840-844
Abstract
Pulsars are rapidly rotating, highly magnetized neutron stars emitting radiation across the electromagnetic spectrum. Although there are more than 1800 known radio pulsars, until recently only seven were observed to pulse in gamma rays, and these were all discovered at other wavelengths. The Fermi Large Area Telescope (LAT) makes it possible to pinpoint neutron stars through their gamma-ray pulsations. We report the detection of 16 gamma-ray pulsars in blind frequency searches using the LAT. Most of these pulsars are coincident with previously unidentified gamma-ray sources, and many are associated with supernova remnants. Direct detection of gamma-ray pulsars enables studies of emission mechanisms, population statistics, and the energetics of pulsar wind nebulae and supernova remnants.
View details for DOI 10.1126/science.1175558
View details for Web of Science ID 000269242400037
View details for PubMedID 19574346
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Detection of High-Energy Gamma-Ray Emission from the Globular Cluster 47 Tucanae with Fermi
SCIENCE
2009; 325 (5942): 845-848
Abstract
We report the detection of gamma-ray emissions above 200 megaelectron volts at a significance level of 17sigma from the globular cluster 47 Tucanae, using data obtained with the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope. Globular clusters are expected to emit gamma rays because of the large populations of millisecond pulsars that they contain. The spectral shape of 47 Tucanae is consistent with gamma-ray emission from a population of millisecond pulsars. The observed gamma-ray luminosity implies an upper limit of 60 millisecond pulsars present in 47 Tucanae.
View details for DOI 10.1126/science.1177023
View details for Web of Science ID 000269242400038
View details for PubMedID 19679807
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PULSED GAMMA-RAYS FROM PSR J2021+3651 WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2009; 700 (2): 1059-1066
View details for DOI 10.1088/0004-637X/700/2/1059
View details for Web of Science ID 000268098100020
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BRIGHT ACTIVE GALACTIC NUCLEI SOURCE LIST FROM THE FIRST THREE MONTHS OF THE FERMI LARGE AREA TELESCOPE ALL-SKY SURVEY
ASTROPHYSICAL JOURNAL
2009; 700 (1): 597-622
View details for DOI 10.1088/0004-637X/700/1/597
View details for Web of Science ID 000267768900049
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DISCOVERY OF PULSATIONS FROM THE PULSAR J0205+6449 IN SNR 3C 58 WITH THE FERMI GAMMA-RAY SPACE TELESCOPE
ASTROPHYSICAL JOURNAL LETTERS
2009; 699 (2): L102-L107
View details for DOI 10.1088/0004-637X/699/2/L102
View details for Web of Science ID 000267372800011
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FERMI/LARGE AREA TELESCOPE DISCOVERY OF GAMMA-RAY EMISSION FROM A RELATIVISTIC JET IN THE NARROW-LINE QUASAR PMN J0948+0022
ASTROPHYSICAL JOURNAL
2009; 699 (2): 976-984
View details for DOI 10.1088/0004-637X/699/2/976
View details for Web of Science ID 000267401500008
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PULSED GAMMA RAYS FROM THE MILLISECOND PULSAR J0030+0451 WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL
2009; 699 (2): 1171-1177
View details for DOI 10.1088/0004-637X/699/2/1171
View details for Web of Science ID 000267401500026
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FERMI/LARGE AREA TELESCOPE BRIGHT GAMMA-RAY SOURCE LIST
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2009; 183 (1): 46-66
View details for DOI 10.1088/0067-0049/183/1/46
View details for Web of Science ID 000267656000004
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FERMI DISCOVERY OF GAMMA-RAY EMISSION FROM NGC 1275
ASTROPHYSICAL JOURNAL
2009; 699 (1): 31-39
View details for DOI 10.1088/0004-637X/699/1/31
View details for Web of Science ID 000267056300004
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EARLY FERMI GAMMA-RAY SPACE TELESCOPE OBSERVATIONS OF THE QUASAR 3C 454.3
ASTROPHYSICAL JOURNAL
2009; 699 (1): 817-823
View details for DOI 10.1088/0004-637X/699/1/817
View details for Web of Science ID 000267056300061
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THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
ASTROPHYSICAL JOURNAL
2009; 697 (2): 1071-1102
View details for DOI 10.1088/0004-637X/697/2/1071
View details for Web of Science ID 000266159500012
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FERMI/LARGE AREA TELESCOPE DISCOVERY OF GAMMA-RAY EMISSION FROM THE FLAT-SPECTRUM RADIO QUASAR PKS 1454-354
ASTROPHYSICAL JOURNAL
2009; 697 (1): 934-941
View details for DOI 10.1088/0004-637X/697/1/934
View details for Web of Science ID 000265764000080
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SIMULTANEOUS OBSERVATIONS OF PKS 2155-304 WITH HESS, FERMI, RXTE, AND ATOM: SPECTRAL ENERGY DISTRIBUTIONS AND VARIABILITY IN A LOW STATE
ASTROPHYSICAL JOURNAL LETTERS
2009; 696 (2): L150-L155
View details for DOI 10.1088/0004-637X/696/2/L150
View details for Web of Science ID 000265531500010
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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE VELA PULSAR
ASTROPHYSICAL JOURNAL
2009; 696 (2): 1084-1093
View details for DOI 10.1088/0004-637X/696/2/1084
View details for Web of Science ID 000265762700003
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Measurement of the Cosmic Ray e(+)+e(-) Spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
PHYSICAL REVIEW LETTERS
2009; 102 (18)
Abstract
Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2 m;{2} sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient electron detection strategy which provides sufficient background rejection for measurement of the steeply falling electron spectrum up to 1 TeV. Our high precision data show that the electron spectrum falls with energy as E-3.0 and does not exhibit prominent spectral features. Interpretations in terms of a conventional diffusive model as well as a potential local extra component are briefly discussed.
View details for DOI 10.1103/PhysRevLett.102.181101
View details for Web of Science ID 000265948600011
View details for PubMedID 19518855
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DISCOVERY OF PULSED gamma-RAYS FROM THE YOUNG RADIO PULSAR PSR J1028-5819 WITH THE FERMI LARGE AREA TELESCOPE
ASTROPHYSICAL JOURNAL LETTERS
2009; 695 (1): L72-L77
View details for DOI 10.1088/0004-637X/695/1/L72
View details for Web of Science ID 000264539700016
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THE PHOSPHORUS, SULFUR, ARGON, AND CALCIUM ISOTOPIC COMPOSITION OF THE GALACTIC COSMIC RAY SOURCE
ASTROPHYSICAL JOURNAL
2009; 695 (1): 666–78
View details for DOI 10.1088/0004-637X/695/1/666
View details for Web of Science ID 000264779500055
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Fermi Observations of High-Energy Gamma-Ray Emission from GRB 080916C
SCIENCE
2009; 323 (5922): 1688-1693
Abstract
Gamma-ray bursts (GRBs) are highly energetic explosions signaling the death of massive stars in distant galaxies. The Gamma-ray Burst Monitor and Large Area Telescope onboard the Fermi Observatory together record GRBs over a broad energy range spanning about 7 decades of gammaray energy. In September 2008, Fermi observed the exceptionally luminous GRB 080916C, with the largest apparent energy release yet measured. The high-energy gamma rays are observed to start later and persist longer than the lower energy photons. A simple spectral form fits the entire GRB spectrum, providing strong constraints on emission models. The known distance of the burst enables placing lower limits on the bulk Lorentz factor of the outflow and on the quantum gravity mass.
View details for DOI 10.1126/science.1169101
View details for Web of Science ID 000264559800029
View details for PubMedID 19228997
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ON THE POSSIBLE ASSOCIATION OF ULTRA HIGH ENERGY COSMIC RAYS WITH NEARBY ACTIVE GALAXIES
ASTROPHYSICAL JOURNAL
2009; 693 (2): 1261–74
View details for DOI 10.1088/0004-637X/693/2/1261
View details for Web of Science ID 000264095100019
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ISOTROPIC GAMMA-RAY BACKGROUND: COSMIC-RAY-INDUCED ALBEDO FROM DEBRIS IN THE SOLAR SYSTEM?
ASTROPHYSICAL JOURNAL LETTERS
2009; 692 (1): L54–L57
View details for DOI 10.1088/0004-637X/692/1/L54
View details for Web of Science ID 000263149000012
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A method to analyze the diffuse, gamma-ray emission with the Fermi Large Area Telescope
AMER INST PHYSICS. 2009: 763-+
View details for Web of Science ID 000263556300167
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MEASUREMENT OF THE SPATIAL DISTRIBUTION OF DIFFUSE TeV GAMMA-RAY EMISSION FROM THE GALACTIC PLANE WITH MILAGRO
ASTROPHYSICAL JOURNAL
2008; 688 (2): 1078–83
View details for DOI 10.1086/592213
View details for Web of Science ID 000261002400028
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The Fermi Gamma-Ray Space Telescope Discovers the Pulsar in the Young Galactic Supernova Remnant CTA 1
SCIENCE
2008; 322 (5905): 1218-1221
Abstract
Energetic young pulsars and expanding blast waves [supernova remnants (SNRs)] are the most visible remains after massive stars, ending their lives, explode in core-collapse supernovae. The Fermi Gamma-Ray Space Telescope has unveiled a radio quiet pulsar located near the center of the compact synchrotron nebula inside the supernova remnant CTA 1. The pulsar, discovered through its gamma-ray pulsations, has a period of 316.86 milliseconds and a period derivative of 3.614 x 10(-13) seconds per second. Its characteristic age of 10(4) years is comparable to that estimated for the SNR. We speculate that most unidentified Galactic gamma-ray sources associated with star-forming regions and SNRs are such young pulsars.
View details for DOI 10.1126/science.1165572
View details for Web of Science ID 000261033400033
View details for PubMedID 18927355
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Inverse Compton origin of the hard X-ray and soft gamma-ray emission from the Galactic ridge
ASTROPHYSICAL JOURNAL
2008; 682 (1): 400-407
View details for Web of Science ID 000257834000031
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A celestial gamma-ray foreground due to the albedo of small solar system bodies and a remote probe of the interstellar cosmic-ray spectrum
ASTROPHYSICAL JOURNAL
2008; 681 (2): 1708-1716
View details for Web of Science ID 000257516000078
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Pre-launch estimates for GLAST sensitivity to dark matter annihilation signals
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2008
View details for DOI 10.1088/1475-7516/2008/07/013
View details for Web of Science ID 000258022800013
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The gamma-ray albedo of the moon
ASTROPHYSICAL JOURNAL
2007; 670 (2): 1467–72
View details for DOI 10.1086/522828
View details for Web of Science ID 000251238300054
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Understanding limitations in the determination of the diffuse Galactic gamma-ray emission
7th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe
ELSEVIER SCIENCE BV. 2007: 44–47
View details for DOI 10.1016/j.nuclphysbps.2007.08.022
View details for Web of Science ID 000252296100011
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Erratum: "inverse compton scattering on solar photons, heliospheric modulation, and neutrino astrophysics" (vol 652, pg L65, 2006)
ASTROPHYSICAL JOURNAL
2007; 664 (2): L143
View details for DOI 10.1086/520882
View details for Web of Science ID 000248675400021
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Dark matter burners
ASTROPHYSICAL JOURNAL
2007; 659 (1): L29–L32
View details for DOI 10.1086/516708
View details for Web of Science ID 000245774100008
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Discovery of TeV gamma-ray emission from the Cygnus region of the Galaxy
ASTROPHYSICAL JOURNAL
2007; 658 (1): L33–L36
View details for DOI 10.1086/513696
View details for Web of Science ID 000244929400009
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Cosmic-ray propagation and interactions in the Galaxy
ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE
2007; 57: 285–327
View details for DOI 10.1146/annurev.nucl.57.090506.123011
View details for Web of Science ID 000251313900010
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Very high energy gamma rays from supernova remnants and constraints on the Galactic interstellar radiation field
AMER INST PHYSICS. 2007: 411-+
View details for Web of Science ID 000248569700123
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Developing the galactic diffuse emission model for the GLAST large area telescope
AMER INST PHYSICS. 2007: 490-+
View details for Web of Science ID 000248569700162
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Identifying dark matter burners in the Galactic center
AMER INST PHYSICS. 2007: 508-+
View details for Web of Science ID 000248569700171
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Analysis methods for Milky Way dark matter halo detection
AMER INST PHYSICS. 2007: 570-+
View details for Web of Science ID 000248569700202
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Inverse Compton scattering on solar photons, heliospheric modulation, and neutrino astrophysics
ASTROPHYSICAL JOURNAL
2006; 652 (1): L65-L68
View details for Web of Science ID 000242125900017
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Inverse Compton emission from Galactic supernova remnants: Effect of the interstellar radiation field
ASTROPHYSICAL JOURNAL
2006; 648 (1): L29-L32
View details for Web of Science ID 000240230300008
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Dissipation of magnetohydrodynamic waves on energetic particles: Impact on interstellar turbulence and cosmic-ray transport
ASTROPHYSICAL JOURNAL
2006; 642 (2): 902–16
View details for DOI 10.1086/501117
View details for Web of Science ID 000237554200023
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Attenuation of very high energy gamma rays by the Milky Way interstellar radiation field
ASTROPHYSICAL JOURNAL
2006; 640 (2): L155-L158
View details for Web of Science ID 000236360600012
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Observations of the Li, Be, and B isotopes and constraints on cosmic-ray propagation
ELSEVIER SCIENCE LTD. 2006: 1558-+
View details for DOI 10.1016/j.asr.2006.09.008
View details for Web of Science ID 000245034500056
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Propagation model for cosmic ray species in the Galaxy
PERGAMON-ELSEVIER SCIENCE LTD. 2005: 162–66
View details for DOI 10.1016/j.asr.2003.08.051
View details for Web of Science ID 000230948100026
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Propagation of secondary antiprotons and cosmic rays in the Galaxy
PERGAMON-ELSEVIER SCIENCE LTD. 2005: 156–61
View details for DOI 10.1016/j.asr.2003.08.050
View details for Web of Science ID 000230948100025
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A new determination of the extragalactic diffuse gamma-ray background from EGRET data
ASTROPHYSICAL JOURNAL
2004; 613 (2): 956–61
View details for DOI 10.1086/423196
View details for Web of Science ID 000224303200025
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Diffuse Galactic continuum gamma rays: A model compatible with EGRET data and cosmic-ray measurements
ASTROPHYSICAL JOURNAL
2004; 613 (2): 962–76
View details for DOI 10.1086/423193
View details for Web of Science ID 000224303200026
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The distribution of cosmic-ray sources in the Galaxy, gamma-rays and the gradient in the CO-to-H(2) relation
ASTRONOMY & ASTROPHYSICS
2004; 422 (3): L47–L50
View details for DOI 10.1051/0004-6361:20040172
View details for Web of Science ID 000223659500001
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CEM2K and LAQGSM codes as event generators for space-radiation-shielding and cosmic-ray-propagation applications
PERGAMON-ELSEVIER SCIENCE LTD. 2004: 1288–96
Abstract
The CEM2k and LAQGSM codes have been recently developed at Los Alamos National Laboratory to simulate nuclear reactions for a number of applications. We have benchmarked our codes against most available data measured at incident particle energies from 10 MeV to 800 GeV and have compared our results with predictions of other current models used by the nuclear community. Here, we present a brief description of our codes and show some illustrative results that testify that CEM2k and LAQGSM can be used as reliable event generators for space-radiation-shielding, cosmic-ray (CR) propagation, and other astrophysical applications. Finally, we show an example of combining of our calculated cross-sections with experimental data from our LANL T-16 compilation to produce evaluated files. Such evaluated files were successfully used in the model of particle propagation in the Galaxy GALPROP to better constrain the size of the CR halo.
View details for DOI 10.1016/j.asr.2003.08.057
View details for Web of Science ID 000225592600003
View details for PubMedID 15880916
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Challenging cosmic-ray propagation with antiprotons: Evidence for a "fresh'' nuclei component?
ASTROPHYSICAL JOURNAL
2003; 586 (2): 1050–66
View details for DOI 10.1086/367697
View details for Web of Science ID 000181713500023
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Secondary antiprotons and propagation of cosmic rays in the galaxy and heliosphere
ASTROPHYSICAL JOURNAL
2002; 565 (1): 280–96
View details for DOI 10.1086/324402
View details for Web of Science ID 000173507200025
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Models for galactic cosmic-ray propagation
ELSEVIER SCIENCE BV. 2001: 717–26
View details for DOI 10.1016/S0273-1177(01)00112-0
View details for Web of Science ID 000171020800011
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Diffuse continuum gamma rays from the galaxy (vol 537, pg 763, 2000)
ASTROPHYSICAL JOURNAL
2000; 541 (2): 1109
View details for Web of Science ID 000089825000053
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Diffuse continuum gamma rays from the galaxy
ASTROPHYSICAL JOURNAL
2000; 537 (2): 763–84
View details for DOI 10.1086/309038
View details for Web of Science ID 000088451100019
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Anisotropic inverse Compton scattering in the Galaxy
ASTROPHYSICAL JOURNAL
2000; 528 (1): 357–67
View details for DOI 10.1086/308138
View details for Web of Science ID 000084941100031
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Diffuse galactic gamma-rays: Constraining cosmic-ray origin and propagation
KLUWER ACADEMIC PUBL. 2000: 247–54
View details for DOI 10.1023/A:1002604831398
View details for Web of Science ID 000089142200033
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Positrons from particle dark-matter annihilation in the Galactic halo: Propagation Green's functions
PHYSICAL REVIEW D
1999; 60 (6)
View details for DOI 10.1103/PhysRevD.60.063003
View details for Web of Science ID 000082734800008
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A pair plasma model for PKS 0208-512
GORDON BREACH SCI PUBL LTD. 1999: 581–84
View details for Web of Science ID 000089508200026
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Puzzles of Galactic continuum gamma-rays
GORDON BREACH SCI PUBL LTD. 1999: 445-+
View details for Web of Science ID 000089508000107
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Propagation of cosmic-ray nucleons in the Galaxy
ASTROPHYSICAL JOURNAL
1998; 509 (1): 212–28
View details for DOI 10.1086/306470
View details for Web of Science ID 000079250400020
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Diffuse galactic gamma rays, cosmic-ray nucleons and antiprotons
ASTRONOMY & ASTROPHYSICS
1998; 338 (3): L75–L78
View details for Web of Science ID 000076735400002
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A combined model for the X-ray to gamma-ray emission of Cygnus X-1
ASTROPHYSICAL JOURNAL
1998; 502 (1): 428–36
View details for DOI 10.1086/305889
View details for Web of Science ID 000077743300036
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Production and propagation of cosmic-ray positrons and electrons
ASTROPHYSICAL JOURNAL
1998; 493 (2): 694–707
View details for DOI 10.1086/305152
View details for Web of Science ID 000071911700018
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Positron propagation in semi-relativistic plasmas: particle spectra and the annihilation line shape
ASTRONOMY & ASTROPHYSICS
1997; 325 (1): 401–13
View details for Web of Science ID A1997XV26500045
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TEV EMISSION FROM CLOSE BINARIES
SPACE SCIENCE REVIEWS
1995; 72 (3-4): 593–627
View details for DOI 10.1007/BF00749007
View details for Web of Science ID A1995RF02600002
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LIGHT CURVES OF CLOSE BINARIES IN TEV ENERGY REGION
UNIV CHICAGO PRESS. 1994: 567–73
View details for DOI 10.1086/192017
View details for Web of Science ID A1994NM31900046
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GAMMA-RAYS FROM POINT GALACTIC SOURCES
UNIV CHICAGO PRESS. 1994: 481–85
View details for DOI 10.1086/192001
View details for Web of Science ID A1994NM31900030
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VERY-HIGH-ENERGY NEUTRINOS FROM THE SUN
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
1993; 19 (9): 1399–1406
View details for DOI 10.1088/0954-3899/19/9/019
View details for Web of Science ID A1993LZ91300018
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CYGNUS-X-3 LIGHT-CURVE MODEL IN THE TEV ENERGY REGION
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
1993; 260 (3): 681–85
View details for DOI 10.1093/mnras/260.3.681
View details for Web of Science ID A1993KJ64500027
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THE SUN AS THE SOURCE OF VHE NEUTRINOS
ASTRONOMY & ASTROPHYSICS
1991; 248 (1): L5–L6
View details for Web of Science ID A1991GC35800002
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ENERGY-SPECTRUM OF GAMMA-RAYS PRODUCED IN THE DECAY OF A GIANT-DIPOLE RESONANCE IN IRON
SOVIET JOURNAL OF NUCLEAR PHYSICS-USSR
1989; 49 (6): 1005–8
View details for Web of Science ID A1989CF09300014
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EQUATION OF STATE OF THE QUARK GLUON PLASMA IN THE MEAN-FIELD MODEL
SOVIET JOURNAL OF NUCLEAR PHYSICS-USSR
1988; 48 (4): 713–14
View details for Web of Science ID A1988U123900028
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THRESHOLD EFFECT IN THE SPECTRA OF MESONS DURING THE HADRONIZATION OF QUARK-GLUON PLASMA
SOVIET JOURNAL OF NUCLEAR PHYSICS-USSR
1988; 47 (6): 1103–6
View details for Web of Science ID A1988R467900035