
Yosuke Utsumi
Physical Science Research Scientist
Kavli Institute for Particle Astrophysics and Cosmology
Web page: https://www.slac.stanford.edu/~youtsumi/
Bio
Yousuke Utsumi works on integration and testing for the Legacy Survey of Space and Time (LSST) camera. The LSST camera is the next generation US's astronomical camera for mapping out the deep universe that will take place at the Vera C. Rubin Observatory.
He has been working on many kinds of astronomical topics through various instrumentation projects, especially focusing on wide-field imaging. Developing the widest astronomical camera, Hyper Suprime-Cam (HSC) of the Subaru telescope operated by the National Astronomical Observatory of Japan, was his first professional experience. He was in charge of developing control software and conducting the camera commissioning. He also led a project to build a new astronomical observatory in Tibet with a 50cm telescope (Hiroshima University Operated Tibet Optical Robotic Imager; HinOTORI) under a collaboration with National Astronomical Observatories of China. He made its optical design, integration, and verification of the whole system and investigation of logistics between Japan and China. He also took an important role to make negotiations with both governments. His scientific interest started from investigating the activity of meteor storms by developing a forward scattering radar but now expanded to investigate Cosmology through weak lensing technique, to explore distant galaxies, and to find new types of astronomical transients associated with gravitational waves or high energy neutrino.
He holds a PhD in Science from the Graduate University for Advanced Studies in Japan. His name in Japanese Kanji Character: 内海 洋輔
Academic Appointments
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Phys Sci Res Assoc, Kavli Institute for Particle Astrophysics and Cosmology
Honors & Awards
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The PASJ Excellent Paper Award, The Astronomical Society of Japan (2020/03/17)
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Prize for Science and Technology in Research Category, The Minister of Education, Culture, Sports, Science and Technology of Japan (2019/4/17)
All Publications
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Velocity Dispersions of Massive Quiescent Galaxies from Weak Lensing and Spectroscopy
ASTROPHYSICAL JOURNAL
2020; 900 (1)
View details for DOI 10.3847/1538-4357/aba61c
View details for Web of Science ID 000566127100001
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A challenge to identify an optical counterpart of the gravitational wave event GW151226 with Hyper Suprime-Cam(dagger)
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70 (1)
View details for DOI 10.1093/pasj/psx125
View details for Web of Science ID 000425504400003
- Optical and NIR Observations for Gravitational Wave Event GW170817 AAPPS Bulletin. Korea. 2018 ; 28 (3): 31–33
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J-GEM observations of an electromagnetic counterpart to the neutron star merger GW170817
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2017; 69 (6)
View details for DOI 10.1093/pasj/psx118
View details for Web of Science ID 000422942400020
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A WEAK LENSING VIEW OF THE DOWNSIZING OF STAR-FORMING GALAXIES
ASTROPHYSICAL JOURNAL
2016; 833 (2)
View details for DOI 10.3847/1538-4357/833/2/156
View details for Web of Science ID 000391169600031
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REDUCING SYSTEMATIC ERROR IN WEAK LENSING CLUSTER SURVEYS
ASTROPHYSICAL JOURNAL
2014; 786 (2)
View details for DOI 10.1088/0004-637X/786/2/93
View details for Web of Science ID 000335884500017
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Hyper Suprime-Cam: the Control System
SPIE-INT SOC OPTICAL ENGINEERING. 2012
View details for DOI 10.1117/12.927235
View details for Web of Science ID 000313675900187
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A LARGE NUMBER OF z > 6 GALAXIES AROUND A QSO AT z = 6.43: EVIDENCE FOR A PROTOCLUSTER?
ASTROPHYSICAL JOURNAL
2010; 721 (2): 1680-1688
View details for DOI 10.1088/0004-637X/721/2/1680
View details for Web of Science ID 000282193600061
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Subaru/HSC deep optical imaging of infrared sources in the AKARI North Ecliptic Pole-Wide field
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2021; 500 (4): 5024–42
View details for DOI 10.1093/mnras/staa3080
View details for Web of Science ID 000606297700052
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Blazar Radio and Optical Survey (BROS): A Catalog of Blazar Candidates Showing Flat Radio Spectrum and Their Optical Identification in Pan-STARRS1 Surveys
ASTROPHYSICAL JOURNAL
2020; 901 (1)
View details for DOI 10.3847/1538-4357/abab07
View details for Web of Science ID 000574485400001
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Search for Optically Dark Infrared Galaxies without Counterparts of Subaru Hyper Suprime-Cam in the AKARI North Ecliptic Pole Wide Survey Field
ASTROPHYSICAL JOURNAL
2020; 899 (1)
View details for DOI 10.3847/1538-4357/ab9cb7
View details for Web of Science ID 000561388900001
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Second data release of the Hyper Suprime-Cam Subaru Strategic Program
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2019; 71 (6)
View details for DOI 10.1093/pasj/psz103
View details for Web of Science ID 000509666400008
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Stellar Population and Structural Properties of Dwarf Galaxies and Young Stellar Systems in the M81 Group
ASTROPHYSICAL JOURNAL
2019; 884 (2)
View details for DOI 10.3847/1538-4357/ab44a7
View details for Web of Science ID 000501779300008
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Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). X. Discovery of 35 Quasars and Luminous Galaxies at 5.7 <= z <= 7.0
ASTROPHYSICAL JOURNAL
2019; 883 (2)
View details for DOI 10.3847/1538-4357/ab3c60
View details for Web of Science ID 000498390600042
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Possible evolution of the circum-galactic medium around QSOs with QSO age and cosmic time revealed by Ly alpha haloes
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2019; 488 (1): 120–34
View details for DOI 10.1093/mnras/stz1707
View details for Web of Science ID 000482319700010
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Infrared luminosity functions based on 18 mid-infrared bands: revealing cosmic star formation history with AKARI and Hyper Suprime-Cam
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2019; 71 (2)
View details for DOI 10.1093/pasj/psz009
View details for Web of Science ID 000489563600016
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Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2019; 71 (2)
View details for DOI 10.1093/pasj/psz010
View details for Web of Science ID 000489563600018
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Quiescent Galaxy Size and Spectroscopic Evolution: Combining HSC Imaging and Hectospec Spectroscopy
ASTROPHYSICAL JOURNAL
2019; 872 (1)
View details for DOI 10.3847/1538-4357/aaf97d
View details for Web of Science ID 000458631300009
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Discovery of the First Low-luminosity Quasar at z > 7
ASTROPHYSICAL JOURNAL LETTERS
2019; 872 (1)
View details for DOI 10.3847/2041-8213/ab0216
View details for Web of Science ID 000458053300002
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Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). V. Quasar Luminosity Function and Contribution to Cosmic Reionization at z=6
ASTROPHYSICAL JOURNAL
2018; 869 (2)
View details for DOI 10.3847/1538-4357/aaee7a
View details for Web of Science ID 000454219200006
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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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Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). IV. Discovery of 41 Quasars and Luminous Galaxies at 5.7 <= z <= 6.9
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2018; 237 (1)
View details for DOI 10.3847/1538-4365/aac724
View details for Web of Science ID 000437414100003
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Multiwavelength study of X-ray luminous clusters in the Hyper Suprime-Cam Subaru Strategic Program S16A field (vol 70, S22, 2018)
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70 (3)
View details for DOI 10.1093/pasj/psy024
View details for Web of Science ID 000439655600027
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The HectoMAP Cluster Survey. I. redMaPPer Clusters
ASTROPHYSICAL JOURNAL
2018; 856 (2)
View details for DOI 10.3847/1538-4357/aab20b
View details for Web of Science ID 000429316100007
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The HectoMAP Cluster Survey. II. X-Ray Clusters
ASTROPHYSICAL JOURNAL
2018; 855 (2)
View details for DOI 10.3847/1538-4357/aaac7a
View details for Web of Science ID 000427362600016
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Subaru Hyper Suprime-Cam Survey for an optical counterpart of GW170817
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70 (2)
View details for DOI 10.1093/pasj/psy007
View details for Web of Science ID 000432287600020
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Two- and three-dimensional wide-field weak lensing mass maps from the Hyper Suprime-Cam Subaru Strategic Program S16A data
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx070
View details for Web of Science ID 000424232800026
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Hyper Suprime-Cam: System design and verification of image quality
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx063
View details for Web of Science ID 000424232800001
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The Hyper Suprime-Cam SSP Survey: Overview and survey design
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx066
View details for Web of Science ID 000424232800004
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Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 quasars and luminous galaxies at 5.7 < z <= 6.8
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx046
View details for Web of Science ID 000424232800035
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First data release of the Hyper Suprime-Cam Subaru Strategic Program
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx081
View details for Web of Science ID 000424232800008
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The on-site quality-assurance system for Hyper Suprime-Cam: OSQAH
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx079
View details for Web of Science ID 000424232800003
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The first-year shear catalog of the Subaru Hyper Suprime-Cam Subaru Strategic Program Survey
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx130
View details for Web of Science ID 000424232800025
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Multiwavelength study of X-ray luminous clusters in the Hyper Suprime-Cam Subaru Strategic Program S16A field
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx132
View details for Web of Science ID 000424232800022
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A large sample of shear-selected clusters from the Hyper Suprime-Cam Subaru Strategic Program S16A Wide field mass maps
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx120
View details for Web of Science ID 000424232800027
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Hyper Suprime-Cam: Camera dewar design
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018; 70
View details for DOI 10.1093/pasj/psx069
View details for Web of Science ID 000424232800002
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Kilonova from post-merger ejecta as an optical and near-Infrared counterpart of GW170817
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2017; 69 (6)
View details for DOI 10.1093/pasj/psx121
View details for Web of Science ID 000422942400021
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No Ly alpha emitters detected around a QSO at z=6.4: Suppressed by the QSO?
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2017; 470 (1): L117–L121
View details for DOI 10.1093/mnrasl/slx088
View details for Web of Science ID 000410095300020
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CLUSTERING OF EXTREMELY RED OBJECTS IN THE SUBARU GTO 2DEG(2) FIELD
JOURNAL OF THE KOREAN ASTRONOMICAL SOCIETY
2017; 50 (3): 61–70
View details for DOI 10.5303/JKAS.2017.50.3.61
View details for Web of Science ID 000404833900003
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J-GEM follow-up observations of the gravitational wave source GW151226
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2017; 69 (1)
View details for DOI 10.1093/pasj/psw113
View details for Web of Science ID 000397053500010
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Ghost in the Subaru Prime Focus Camera
ASTRONOMICAL SOC PACIFIC. 2017: 651–54
View details for Web of Science ID 000442046200144
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GALAXY-SCALE GRAVITATIONAL LENS CANDIDATES FROM THE HYPER SUPRIME-CAM IMAGING SURVEY AND THE GALAXY AND MASS ASSEMBLY SPECTROSCOPIC SURVEY
ASTROPHYSICAL JOURNAL
2016; 832 (2)
View details for DOI 10.3847/0004-637X/832/2/135
View details for Web of Science ID 000389049800006
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SUBARU HIGH-z EXPLORATION OF LOW-LUMINOSITY QUASARS (SHELLQs). I. DISCOVERY OF 15 QUASARS AND BRIGHT GALAXIES AT 5.7 < z < 6.9
ASTROPHYSICAL JOURNAL
2016; 828 (1)
View details for DOI 10.3847/0004-637X/828/1/26
View details for Web of Science ID 000386894900026
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J-GEM follow-up observations to search for an optical counterpart of the first gravitational wave source GW150914
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2016; 68 (4)
View details for DOI 10.1093/pasj/psw061
View details for Web of Science ID 000385634000001
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A SPECTROSCOPICALLY CONFIRMED DOUBLE SOURCE PLANE LENS SYSTEM IN THE HYPER SUPRIME-CAM SUBARU STRATEGIC PROGRAM
ASTROPHYSICAL JOURNAL LETTERS
2016; 826 (2)
View details for DOI 10.3847/2041-8205/826/2/L19
View details for Web of Science ID 000381334800003
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Hyper-luminous dust-obscured galaxies discovered by the Hyper Suprime-Cam on Subaru and WISE
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2015; 67 (5)
View details for DOI 10.1093/pasj/psv057
View details for Web of Science ID 000362834000008
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A HYPER SUPRIME-CAM VIEW OF THE INTERACTING GALAXIES OF THE M81 GROUP
ASTROPHYSICAL JOURNAL LETTERS
2015; 809 (1)
View details for DOI 10.1088/2041-8205/809/1/L1
View details for Web of Science ID 000359321900001
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PROPERTIES OF WEAK LENSING CLUSTERS DETECTED ON HYPER SUPRIME-CAM's 2.3 deg(2) FIELD
ASTROPHYSICAL JOURNAL
2015; 807 (1)
View details for DOI 10.1088/0004-637X/807/1/22
View details for Web of Science ID 000358945200022