Steven Kahn
Cassius Lamb Kirk Professor of Natural Sciences and Professor of Particle Physics and Astrophysics, Emeritus
SLAC General Program
Academic Appointments
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Emeritus Faculty, Acad Council, SLAC General Program
2024-25 Courses
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Independent Studies (3)
- Ph.D. Research
CME 400 (Aut, Win, Spr, Sum) - Problems in Aero/Astro
AA 290 (Aut, Win, Spr) - Research
PHYSICS 490 (Aut, Win, Spr, Sum)
- Ph.D. Research
All Publications
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The LSST DESC DC2 Simulated Sky Survey
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2021; 253 (1)
View details for DOI 10.3847/1538-4365/abd62c
View details for Web of Science ID 000628196900001
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Improving Astronomy Image Quality Through Real-time Wavefront Estimation
IEEE COMPUTER SOC. 2021: 2076-2085
View details for DOI 10.1109/CVPRW53098.2021.00236
View details for Web of Science ID 000705890202021
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LSST: From Science Drivers to Reference Design and Anticipated Data Products
ASTROPHYSICAL JOURNAL
2019; 873 (2)
View details for DOI 10.3847/1538-4357/ab042c
View details for Web of Science ID 000460963800009
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Searching for Subsecond Stellar Variability with Wide-field Star Trails and Deep Learning
ASTROPHYSICAL JOURNAL
2018; 868 (1)
View details for DOI 10.3847/1538-4357/aae7cf
View details for Web of Science ID 000450302700003
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EVIDENCE FOR NONLINEAR GROWTH OF STRUCTURE FROM AN X-RAY-SELECTED CLUSTER SURVEY USING A NOVEL JOINT ANALYSIS OF THE CHANDRA AND XMM-NEWTON ARCHIVES
ASTROPHYSICAL JOURNAL
2009; 707 (2): 878-889
View details for DOI 10.1088/0004-637X/707/2/878
View details for Web of Science ID 000272465400004
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High-resolution x-ray spectroscopy with the EBIT Calorimeter Spectrometer
AMER INST PHYSICS. 2009: 454-+
View details for DOI 10.1063/1.3292376
View details for Web of Science ID 000281588500100
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Performance of the EBIT calorimeter spectrometer
17th Topical Conference on High-Temperature Plasma Diagnostics
AMER INST PHYSICS. 2008
Abstract
The EBIT calorimeter spectrometer (ECS) is a new high-resolution, broadband x-ray spectrometer that has recently been installed at the Electron Beam Ion Trap Facility (EBIT) at the Lawrence Livermore National Laboratory. The ECS is an entirely new production class spectrometer that replaces the XRS/EBIT spectrometer that has been operating at EBIT since 2000. The ECS utilizes a 32-pixel x-ray calorimeter array from the XRS instrument on the Suzaku x-ray observatory. Eighteen of the pixels are optimized for the 0.1-10 keV band and yield 4.5 eV full width at half maximum energy resolution and 95% quantum efficiency at 6 keV. In addition, the ECS includes 14 detector pixels that are optimized for the high-energy band with a bandpass from 0.5 to over 100 keV with 34 eV resolution and 32% quantum efficiency at 60 keV. The ECS detector array is operated at 50 mK using a five stage cryogenic system that is entirely automated. The instrument takes data continuously for over 65 h with a 2.5 h recycle time. The ECS is a nondispersive, broadband, highly efficient spectrometer that is one of the prime instruments at the EBIT facility. The instrument is used for studies of absolute cross sections, charge exchange recombination, and x-ray emission from nonequilibrium plasmas, among other measurements in our laboratory astrophysics program.
View details for DOI 10.1063/1.2957925
View details for Web of Science ID 000260573500065
View details for PubMedID 19044469
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First-year spectroscopy for the Sloan Digital Sky Survey-II supernova survey
ASTRONOMICAL JOURNAL
2008; 135 (5): 1766-1784
View details for DOI 10.1088/0004-6256/135/5/1766
View details for Web of Science ID 000255407700012
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The XRS microcalorimeter spectrometer at the Livermore electron beam ion trap
12th International Workshop on Electron Beam Ion Trap
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS. 2008: 231–40
View details for DOI 10.1139/P07-147
View details for Web of Science ID 000253774700022
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Laboratory astrophysics in the extreme ultraviolet
12th International Workshop on Electron Beam Ion Trap
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS. 2008: 175–82
View details for DOI 10.1139/P07-167
View details for Web of Science ID 000253774700015
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The LSST Camera Overview: Design and Performance
Conference on Ground-Based and Airborne Instrumentation for Astronomy II
SPIE-INT SOC OPTICAL ENGINEERING. 2008
View details for DOI 10.1117/12.789947
View details for Web of Science ID 000259917700012
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The Sloan Digital Sky Survey-II Supernova Survey: Technical summary
ASTRONOMICAL JOURNAL
2008; 135 (1): 338-347
View details for DOI 10.1088/0004-6256/135/1/338
View details for Web of Science ID 000252399600029
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Laboratory measurements of 3 -> 2 X-ray line ratios of F-like Fe XVIII and Ni XX
ASTROPHYSICAL JOURNAL
2007; 670 (2): 1504-1509
View details for Web of Science ID 000251238300057
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Evidence for the importance of resonance scattering in X-ray emission line profiles of the O star xi Puppis
ASTROPHYSICAL JOURNAL
2007; 659 (1): 642-649
View details for Web of Science ID 000245773300052
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Wavelength measurements of Ni L-shell lines between 9 and 15 angstrom
ASTROPHYSICAL JOURNAL
2007; 657 (2): 1172-1177
View details for Web of Science ID 000244928500043
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On the putative detection of z > 0 X-ray absorption features in the spectrum of Mrk 421
ASTROPHYSICAL JOURNAL
2007; 656 (1): 129-138
View details for Web of Science ID 000244032600010
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Laboratory measurements of high-n iron L-shell X-ray lines
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2007; 168 (2): 319-336
View details for Web of Science ID 000244033100008
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First use of a HyViSI H4RG for astronomical observations
Conference on Focal Plane Arrays for Space Telescopes III
SPIE-INT SOC OPTICAL ENGINEERING. 2007
View details for DOI 10.1117/12.740088
View details for Web of Science ID 000251052300014
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The X-ray observatory Suzaku
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2007; 59: S1-S7
View details for Web of Science ID 000244441700001
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X-ray spectral study of the photoionized stellar wind in Vela X-1
ASTROPHYSICAL JOURNAL
2006; 651 (1): 421-437
View details for Web of Science ID 000241824300037
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Measurements and analysis of helium-like triplet ratios in the X-ray spectra of O-type stars
ASTROPHYSICAL JOURNAL
2006; 650 (2): 1096-1110
View details for Web of Science ID 000241497700047
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Capella corona revisited: A combined view from XMM-Newton RGS and Chandra HETGS and LETGS
ASTROPHYSICAL JOURNAL
2006; 649 (2): 979-991
View details for Web of Science ID 000240854200037
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Electron impact excitation cross section measurement for n=3 to n=2 line emission in Fe17+ to Fe23+
ASTROPHYSICAL JOURNAL
2006; 646 (1): 653-665
View details for Web of Science ID 000239644900056
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Energy-dependent excitation cross section measurements of the diagnostic lines of Fe XVII
PHYSICAL REVIEW LETTERS
2006; 96 (25)
Abstract
By implementing a large-area, gain-stabilized microcalorimeter array on an electron beam ion trap, the electron-impact excitation cross sections for the dominant x-ray lines in the Fe XVII spectrum have been measured as a function of electron energy establishing a benchmark for atomic calculations. The results show that the calculations consistently predict the cross section of the resonance line to be significantly larger than measured. The lower cross section accounts for several problems found when modeling solar and astrophysical Fe XVII spectra.
View details for DOI 10.1103/PhysRevLett.96.253201
View details for Web of Science ID 000238697000015
View details for PubMedID 16907303
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Inner-shell absorption lines of FeVI-Fe XVI: A many-body perturbation theory approach
ASTROPHYSICAL JOURNAL
2006; 641 (2): 1227-1232
View details for Web of Science ID 000236819400054
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Phonon-mediated distributed transition-edge-sensor X-ray detectors for surveys of galaxy clusters and the warm-hot interstellar medium
11th International Workshop on Low-Temperature Detectors
ELSEVIER SCIENCE BV. 2006: 488–90
View details for DOI 10.1016/j.nima.2005.12.195
View details for Web of Science ID 000236974700050
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The LSST camera overview
Conference on Ground-Based and Airborne Instrumentation for Astronomy
SPIE-INT SOC OPTICAL ENGINEERING. 2006
View details for DOI 10.1117/12.673236
View details for Web of Science ID 000240348500012
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Laboratory measurement and theoretical modeling of K-shell X-ray lines from inner-shell excited and ionized ions of oxygen
ASTROPHYSICAL JOURNAL
2005; 627 (2): 1066-1071
View details for Web of Science ID 000230191800044
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Laboratory simulation of cometary X-rays using a high-resolution microcalorimeter
12th International Conference on the Physics of Highly Charged Ions
ELSEVIER SCIENCE BV. 2005: 116–119
View details for DOI 10.1016/j.nimb.2005.03.156
View details for Web of Science ID 000230334400023
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Comparisons of laboratory wavelength measurements with theoretical calculations for neon-like through lithium-like argon, sulfur and silicon
12th International Conference on the Physics of Highly Charged Ions
ELSEVIER SCIENCE BV. 2005: 131–134
View details for DOI 10.1016/j.nimb.2005.03.159
View details for Web of Science ID 000230334400026
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Emission-line spectra of SVII-S XIV in the 20-75 A wavelength region
ASTROPHYSICAL JOURNAL
2005; 625 (2): 1045-1061
View details for Web of Science ID 000229436900044
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XMM-Newton observations of the heavily absorbed Seyfert 1 galaxy IC 4329A
ASTRONOMY & ASTROPHYSICS
2005; 432 (2): 453-462
View details for DOI 10.1051/0004-6361:20041542
View details for Web of Science ID 000227494200017
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Excitation cross section measurement for n=3 to n=2 line emission in Fe20+ to Fe23+
ASTROPHYSICAL JOURNAL
2005; 618 (2): 1086-1094
View details for Web of Science ID 000226293800052
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New results in laboratory X-ray astrophysics
25th General Assembly of the International-Astronomical-Union
ASTRONOMICAL SOC PACIFIC. 2005: 633–639
View details for Web of Science ID 000240768700177
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Multivariate Monte Carlo methods for the reflection grating spectrometers on XMM-Newton
ASTROPHYSICAL JOURNAL
2004; 615 (1): 545-554
View details for Web of Science ID 000224760800052
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The Astro-E2 X-ray spectrometer/EBIT microcalorimeter x-ray spectrometer
15th Topical Conference on High-Temperature Plasma Diagnostics
AMER INST PHYSICS. 2004: 3772–74
View details for DOI 10.1063/1.1781758
View details for Web of Science ID 000224755900118
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Detection of a fully resolved Compton shoulder of the iron K alpha line in the Chandra X-ray spectrum of GX 301-2
ASTROPHYSICAL JOURNAL
2003; 597 (1): L37-L40
View details for Web of Science ID 000186171700010