Researcher Database

SHIDATSU, Megumi

Faculty
Position
Last Updated :2020/07/04

Researcher Profile and Settings

Profile and Settings

Name

  • Name

    SHIDATSU, Megumi

Education, Etc.

Education

  • 2010/04 - 2012/03, Kyoto University, Graduate School of Science
  • 2006/04 - 2010/03, Kyoto University, Faculty of Science
  • Kyoto University, Graduate School of Science

その他基本情報

Association Memberships

  • THE ASTRONOMICAL SOCIETY OF JAPAN

Academic & Professional Experience

  • 2020/04 - Today, assistant professor, Graduate School of Science and Engineering, Ehime University
  • 2018/02 - 2020/03, assistant professor, Graduate School of Science and Engineering Mathematics, Physics, and Earth Sciences, Ehime University
  • 2015/04 - 2018/02, Special Postdoctoral Researcher, Global Research Cluster, MAXI team, RIKEN
  • 2012/04 - 2015/03, JSPS fellow (DC1), Department of Astronomy, Graduate School of Science, Kyoto University

Research Activities

Research Areas, Etc.

Research Areas

  • Natural sciences, Astronomy
  • Natural sciences, Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics

Research Interests

  • accretion disks
  • black holes
  • X-ray astronomy
  • astrophysics

Book, papers, etc

Published Papers

  • Application of the Thermal Wind Model to Absorption Features in the Black Hole X-Ray Binary H1743-322, Megumi Shidatsu, Chris Done, The Astrophysical Journal, The Astrophysical Journal, 2019/11, [Refereed], 10.3847/1538-4357/ab46b3
  • 2019/10, [Refereed], 0004-6264, 10.1093/pasj/psz091
  • NuSTAR Discovery of Dead Quasar Engine in Arp 187, Ichikawa, Kohei, Kawamuro, Taiki, Shidatsu, Megumi, Ricci, Claudio, Bae, Hyun-Jin, Matsuoka, Kenta, Shin, Jaejin, Toba, Yoshiki, Ueda, Junko, Ueda, Yoshihiro, The Astrophysical Journal Letters, The Astrophysical Journal Letters, 2019/09, [Refereed], 10.3847/2041-8213/ab3ebf
  • 2019/04, [Refereed], 0004-637X, 10.3847/1538-4357/ab09ff
  • Does the mid-infrared-hard X-ray luminosity relation for active galactic nuclei depend on Eddington ratio?, Toba, Y, Ueda, Y, Matsuoka, K, Shidatsu, M, Nagao, T, et al., Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 2019/03, [Refereed]
  • Discovery of Dying Active Galactic Nucleus in Arp 187: Experience of Drastic Luminosity Decline within 10^4 yr, Ichikawa, K, Ueda, J, Bae, H, Kawamuro, T, Matsuoka, K, Toba, Y, Shidatsu, M, The Astrophysical Journal, The Astrophysical Journal, 2019/01, [Refereed], 10.3847/1538-4357/aaf233
  • Evolution of Thermally Driven Disk Wind in the Black Hole Binary 4U 1630$-$47 Observed with Suzaku and NuSTAR, Hori, T, Ueda, Y, Done, C, Shidatsu, M, Kubota, A, The Astrophysical Journal, The Astrophysical Journal, 2018/12, [Refereed], 10.3847/1538-4357/aaea5e
  • 2018/11, [Refereed], 0004-637X, 10.3847/1538-4357/aae929
  • Ratio of black hole to galaxy mass of an extremely red dust-obscured galaxy at z = 2.52, Matsuoka K, Toba Y, Shidatsu M, Astronomy & Astrophysics, Astronomy & Astrophysics, 2018/11, [Refereed]
  • 2018/10, [Refereed], 0067-0049, 10.3847/1538-4365/aad1ef
  • 2018/10, [Refereed], 0004-6264, 10.1093/pasj/psy093
  • State transitions of GRS 1739-278 in the 2014 outburst, Wang, Sili, Kawai, Nobuyuki, Shidatsu, Megumi, Tachibana, Yutaro, a, Publications of the Astronomical Society of Japan, Publications of the Astronomical Society of Japan, 2018/08, [Refereed], 10.1093/pasj/psy058
  • Detection of polarized gamma-ray emission from the Crab nebula with Hitomi Soft Gamma-ray Detector, Hitomi Collaboration, Shidatsu, M, author out o, Publications of Astronomical Society of Japan, Publications of Astronomical Society of Japan, 2018/08, [Refereed], 10.1093/pasj/psy118
  • Concept of the X-ray Astronomy Recovery Mission, Tashiro, Makoto, Maejima, Hironori, Toda, Kenichi et, al, Shidatsu, M, author out, Proceedings of the SPIE, Proceedings of the SPIE, 2018/07, 10.1117/12.2309455
  • Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9, Hitomi Collaboration, Shidatsu, M, author out o, Publication of Astronomical Society of Japan, Publication of Astronomical Society of Japan, 2018/06, [Refereed], 10.1093/pasj/psy027
  • 2018/04, [Refereed], 2329-4124, 10.1117/1.JATIS.4.2.021402
  • Erratum: Rapid Optical Variations Correlated with X-rays in the 2015 Second Outburst of V404 Cygni (GS 2023+338), Kimura, Mariko, Kato, Taichi, Isogai, Keisuke, Tak, Hyungsuk, Shidatsu, Megumi, Itoh, Hiroshi, Tordai, Tamás, Kasai, Kiyoshi, Goff, William, Kiyota, Seiichiro, Pickard, Roger D, Matsumoto, Katsura, Kojiguchi, Naoto, Sugiura, Yuki, Yamada, Eiji, Tatsumi, Taiki, Miyashita, Atsushi, Dubovsky, Pavol A, Kudzej, Igor, de Miguel, Enrique, Stein, William L, Maeda, Yutaka, Pavlenko, Elena P, Sosnovskij, Aleksei A, Babina, Julia V, Cook, Lewis M, Nogami, Daisaku, Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 2018/04, [Refereed]
  • Temperature structure in the Perseus cluster core observed with Hitomi, Hitomi Collaboration, Shidatsu, M, h, author out, Publications of the Astronomical Society of Japan, Publications of the Astronomical Society of Japan, 2018/03, [Refereed], 10.1093/pasj/psy004
  • Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi, Hitomi Collaboration, Shidatsu, M, author out, Publications of the Astronomical Society of Japan, Publications of the Astronomical Society of Japan, 2018/03, [Refereed], 10.1093/pasj/psx156
  • 2018/03, [Refereed], 0004-6264, 10.1093/pasj/psx083
  • 2018/03, [Refereed], 0067-0049, 10.3847/1538-4365/aaa89c
  • Atmospheric gas dynamics in the Perseus cluster observed with Hitomi, Hitomi Collaboration, Shidatsu, M, h, author out, Publications of Astronomical Society of Japan, Publications of Astronomical Society of Japan, 2018/03, [Refereed], 10.1093/pasj/psx138
  • Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS, Hitomi Collaboration, Shidatsu, M, h, author out, Publications of Astronomical Society of Japan, Publications of Astronomical Society of Japan, 2018/03, [Refereed], 10.1093/pasj/psx127
  • Hitomi observation of radio galaxy NGC 1275: The first X-ray microcalorimeter spectroscopy of Fe-K{$\alpha$} line emission from an active galactic nucleus, Hitomi Collaboration, Shidatsu, M, author out o, Publications of Astronomical Society of Japan, Publications of Astronomical Society of Japan, 2018/03, [Refereed], 10.1093/pasj/psx147
  • Search for thermal X-ray features from the Crab nebula with the Hitomi soft X-ray spectrometer, Hitomi Collaboration, Shidatsu, M, author out o, Publications of Astronomical Society of Japan, Publications of Astronomical Society of Japan, 2018/03, [Refereed], 10.1093/pasj/psx072
  • Hitomi observations of the LMC SNR N 132 D: Highly redshifted X-ray emission from iron ejecta, Hitomi Collaboration, Shidatsu, M, author out, Publications of Astronomical Society of Japan, Publications of Astronomical Society of Japan, 2018/03, [Refereed], 10.1093/pasj/psx151
  • Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi, Hitomi Collaboration, Shidatsu, M, author out o, Publications of Astronomical Society of Japan, Publications of Astronomical Society of Japan, 2018/03, [Refereed], 10.1093/pasj/psx154
  • Inorbit performance of the Hard X-ray Telescope (HXT) on board the Hitomi (ASTRO-H) satellite, Hironori Matsumoto, Hisamitsu Awaki, Manabu Ishida, Akihiro Furuzawa, Shigeo Yamauchi, Yoshitomo Maeda, Ikuyuki Mitsuishi, Yoshito Haba, Takayuki Hayashi, Ryo Iizuka, Kazunori Ishibashi, Masayuki Itoh, Hideyo Kunieda, Takuya Miyazawa, Hideyuki Mori, Takashi Okajima, Satoshi Sugita, Keisuke Tamura, Yuzuru Tawara, Journal of Astronomical Telescopes, Instruments, and Systems, Journal of Astronomical Telescopes, Instruments, and Systems, 2018/02, 10.1117/1.
  • 2018/01, [Refereed], 2329-4124, 10.1117/1.JATIS.4.1.011210
  • 2017/12, [Refereed], 0004-637X, 10.3847/1538-4357/aa93f0
  • 2017/11, [Refereed], 0028-0836, 10.1038/nature24301
  • 2017/10, [Refereed], 0035-8711, 10.1093/mnras/stx1555
  • 2017/05, [Refereed], 0035-8711, 10.1093/mnras/stx020
  • 2017/04, [Refereed], 0004-637X, 10.3847/1538-4357/aa67e7
  • 2017/03, [Refereed], 2041-8205, 10.3847/2041-8213/aa61fa
  • Violent Optical Variations and Correlation between Optical and X-ray Variability During the 2015 Outbursts in V404 Cygni, Kimura, Mariko, Kato, Taichi, Isogai, Keisuke, Tak, Hyungsuk, Shidatsu, Megumi, al, Proceeding of 7 years of MAXI: monitoring X-ray Transients, Proceeding of 7 years of MAXI: monitoring X-ray Transients, 2017/03
  • MAXI/GSC 7-year all-sky map and studies of large-scale diffuse structures, Shidatsu, Megumi, Ueda, Yoshihiro, Kawamuro, Taiki, Hori, Takafumi, Nakahira, Satoshi, MAXI Team, Proceeding of 7 years of MAXI: monitoring X-ray Transients, Proceeding of 7 years of MAXI: monitoring X-ray Transients, 2017/03
  • The MAXI/GSC catalog in the low Galactic-latitude sky, Hori, Takafumi, Ueda, Yoshihiro, Shidatsu, Megumi, al, Proceeding of 7 years of MAXI: monitoring X-ray Transients, Proceeding of 7 years of MAXI: monitoring X-ray Transients, 2017/03
  • MAXI Data Archive Plan, Ebisawa, K, Nahahira, S, Sugawara, Y, Ueno, S, Tomida, H, Furusho, T, Mihara, T, Sugizaki, M, Shidatsu, M, Serino, M, Negoro, H, Nakagawa, Y, Angelini, L, Proceeding of 7 years of MAXI: monitoring X-ray Transients, Proceeding of 7 years of MAXI: monitoring X-ray Transients, 2017/03
  • Hard X-ray Luminosity Function of Tidal Disruption Events: First Results from MAXI Extragalactic Survey, Kawamuro, Taiki, Ueda, Yoshihiro, Shidatsu, Megumi, Hori, Takafumi, Kawai, Nobuyuki, Negoro, Hitoshi, Mihara, Tatehiro, Proceeding of 7 years of MAXI: monitoring X-ray Transients, Proceeding of 7 years of MAXI: monitoring X-ray Transients, 2017/03
  • 2017/02, [Refereed], 0004-637X, 10.3847/1538-4357/836/2/225
  • 2017/01, [Refereed], 2041-8205, 10.3847/2041-8213/aa91c9
  • 2017, 0277-786X, 10.1117/12.2275605
  • 2017, [Refereed]
  • 2017, 0277-786X, 10.1117/12.2272844
  • 2016/10, [Refereed], 0004-6264, 10.1093/pasj/psw081
  • 2016/10, [Refereed], 2329-4124, 10.1117/1.JATIS.2.4.044001
  • 2016/10, [Refereed], 1094-4087, 10.1364/OE.24.025548
  • 2016/08, [Refereed], 0004-6264, 10.1093/pasj/psw056
  • 2016/07, [Refereed], 0028-0836, 10.1038/nature18627
  • 2016/06, [Refereed], 0004-637X, 10.3847/0004-637X/823/2/159
  • 2016/06, [Refereed], 0004-6264, 10.1093/pasj/psw016
  • 2016/06, [Refereed], 0004-6264, 10.1093/pasj/psw001
  • 2016/05, [Refereed], 0004-6337, 10.1002/asna.201612331
  • 2016/02, [Refereed], 0004-6264, 10.1093/pasj/psv112
  • 2016/01, [Refereed], 0028-0836, 10.1038/nature16452
  • 2016, 0277-786X, 10.1117/12.2232379
  • 2016
  • 2016, [Refereed], 0277-786X, 10.1117/12.2231705
  • 2016, [Refereed], 0277-786X, 10.1117/12.2234230
  • 2016, 0277-786X, 10.1117/12.2231173
  • 2016, 0277-786X, 10.1117/12.2231258
  • 21pCD-1 Scientific Results obtained by Monitor of All-sky X-ray Image, MAXI, in 2014-2015, Negoro H., Serino M., Shidatsu M., Matsuoka M., Kawai N., Tsunemi H., Yoshida A., Sakamoto T., Nakajima M., Ueda Y., Tsuboi Y., Ueno S., Yamauchi M., Morii M., Yamaoka K., MAXI Team, Tomida H., Nakahira S., Kimura M., Ishikawa M., Nakagawa Y., Mihara T., Sugizaki M., Meeting Abstracts of the Physical Society of Japan, Meeting Abstracts of the Physical Society of Japan, 2016, [Refereed], 10.11316/jpsgaiyo.71.1.0_502
  • 2015/07, [Refereed], 1745-2473, 10.1038/NPHYS3348
  • 2015/07, [Refereed], 2329-4124, 10.1117/1.JATIS.1.3.034001
  • 2015/04, [Refereed], 0004-6264, 10.1093/pasj/psv003
  • 2015/01, [Refereed], 0004-637X, 10.1088/0004-637X/798/1/27
  • ASTRO-H White Paper - Stellar-Mass Black Holes, 2014/12
  • 2014/11, [Refereed], 1559-128X, 10.1364/AO.53.007664
  • Suzaku Observation of the Black Hole Binary 4U 1630-47 in the Very High State, Hori, Takafumi, Ueda, Yoshihiro, Shidatsu, Megumi, Kawamuro, Taiki, Kubota, Aya, Done, Chris, Nakahira, Satoshi, Proceedings of Suzaku-MAXI 2014: Expanding the Frontiers of the X-ray Universe, Proceedings of Suzaku-MAXI 2014: Expanding the Frontiers of the X-ray Universe, 2014/09
  • A MAXI monitoring of long-term X-ray variability in Seyfert galaxies, Ueno, Shiro, Sato, Ryosuke, Ueda, Yoshihiro, Hiroi, Kazuo, Hayashida, Masaaki, Shidatsu, Megumi, Kawamuro, Taiki, Proceedings of Suzaku-MAXI 2014: Expanding the Frontiers of the X-ray Universe, Proceedings of Suzaku-MAXI 2014: Expanding the Frontiers of the X-ray Universe, 2014/09
  • 2014/07, [Refereed], 0004-637X, 10.1088/0004-637X/790/1/20
  • 2014/07, [Refereed], 0004-637X, 10.1088/0004-637X/789/2/100
  • 2014, [Refereed], 0004-6264, 10.1093/pasj/psu060
  • 2014, [Refereed], 0004-6264, 10.1093/pasj/psu063
  • 2014, [Refereed]
  • 2014, 0277-786X, 10.1117/12.2054633
  • 2013/12, [Refereed], 0004-637X, 10.1088/0004-637X/779/1/26
  • 2013/12, 0004-637X, 10.1088/0004-637X/779/1/26
  • MAXI/GSC Discovery of the Black-Hole Candidate MAXI J1305-704, Morihana, Kumiko, Sugizaki, Mutsumi, Nakahira, Satoshi, Shidatsu, Megumi, Ueda, Yoshihiro, t, al, Publications of Astronomical Society of Japan, Publications of Astronomical Society of Japan, 2013/10, [Refereed], 10.1093/pasj/65.5.L10
  • 2013/08, [Refereed], 0067-0049, 10.1088/0067-0049/207/2/36
  • 2013/08, [Refereed], 0004-6264, 10.1093/pasj/65.4.73
  • 2013/06, [Refereed], 0004-6264, 10.1093/pasj/65.3.58
  • 2013, 0277-786X, 10.1117/12.2024764
  • 3 years all-sky X-ray observations with MAXI, Negoro, Hitoshi, et al, Shidatsu, M, author out, Proceedings of Half a Century of X-ray Astronomy, Proceedings of Half a Century of X-ray Astronomy, 2012/09
  • 2012/08, [Refereed], 0004-6264, 10.1093/pasj/64.4.79
  • 2012/08, [Refereed], 0004-6264, 10.1093/pasj/64.4.88
  • 2012/02, [Refereed], 0004-6264, 10.1093/pasj/64.1.13
  • 2012, 0277-786X, 10.1117/12.925847
  • 2012, 0277-786X, 10.1117/12.927271
  • 2012, [Refereed], 0094-243X, 10.1063/1.3696164
  • 2012, 0277-786X, 10.1117/12.926753
  • 25aGJ-2 Background study for MAXI/GSC on International Space Station, Kohama Mitsuhiro, Shidatsu Megumi, Nakahira Satoshi, Sugizaki Mutsumi, Meeting Abstracts of the Physical Society of Japan, Meeting Abstracts of the Physical Society of Japan, 2012, [Refereed], 10.11316/jpsgaiyo.67.1.1.0_133_2
  • 2011/11, [Refereed], 0004-6264, 10.1093/pasj/63.sp3.S677
  • 2011/11, [Refereed], 0004-6264, 10.1093/pasj/63.sp3.S713
  • 2011/11, [Refereed], 0004-6264, 10.1093/pasj/63.sp3.S803
  • 2011/11, [Refereed], 0004-6264, 10.1093/pasj/63.sp3.S821
  • 2011/11, [Refereed], 0004-6264, 10.1093/pasj/63.sp3.S937
  • 2011/11, [Refereed], 0004-6264, 10.1093/pasj/63.sp3.S1035
  • 2011/11, [Refereed], 0004-6264, 10.1093/pasj/63.sp3.S739
  • 2011/11, [Refereed], 0004-6264, 10.1093/pasj/63.sp3.S759
  • 2011/11, [Refereed], 0004-6264, 10.1093/pasj/63.sp3.S785
  • 2011, 1743-9213, 10.1017/S1743921310016091
  • 2011, 0277-786X, 10.1117/12.893155
  • X-ray and Near-Infrared Observations of the Black Hole Candidate GX 339-4, Shidatsu, M, Ueda, Y, Tazaki, F, t, al, Proceedings of the First Year of MAXI: Monitoring Variable X-ray Sources, Proceedings of the First Year of MAXI: Monitoring Variable X-ray Sources, 2010/12, [Refereed]
  • 2010, 0277-786X, 10.1117/12.857421
  • 2010, [Refereed], 0094-243X, 10.1063/1.3475212
  • 2010, 0277-786X, 10.1117/12.856892
  • 2009/12, 0004-6264, 10.1093/pasj/61.6.1217
  • Development of high-resolution and light-weight x-ray optics with deformed silicon wafers, Yuichiro Ezoe, Takayuki Shirata, Takaya Ohashi, Manabu Ishida, Kazuhisa Mitsuda, Kozo Fujiwara, Kohei Morishita, Kazuo Nakajima, Proceedings of SPIE - The International Society for Optical Engineering, Proceedings of SPIE - The International Society for Optical Engineering, 2009/09, 0277-786X, 10.1117/12.823932
  • 2009/08, [Refereed], 0004-6264, 10.1093/pasj/61.4.L13
  • Current status of the Astro-H x-ray telescope system, Hisamitsu Awaki, Yasushi Ogasaka, Hideyo Kunieda, Akihiro Furuzawa, Hideyuki Mori, Takuya Miyazawa, Yoshito Haba, Yuzuru Tawara, Koujyun Yamashita, Peter Serlemitsos, Yang Soong, Takashi Okajima, Manabu Ishida, Yoshitomo Maeda, Keisuke Tamura, Yoshiharu Namba, Kentaro Uesugi, Yoshio Suzuki, Keiji Ogi, Masayuki Itoh, Tatsuro Kosaka, Hiroshi Tsunemi, Proceedings of SPIE - The International Society for Optical Engineering, Proceedings of SPIE - The International Society for Optical Engineering, 2009, [Refereed], 0277-786X, 10.1117/12.826004
  • 2008/02, [Refereed], 0004-6264, 10.1093/pasj/60.sp1.S333
  • 2008, [Refereed], 0277-786X, 10.1117/12.789640
  • Design study of telescope housing for the NeXT/XRT, Hisamitsu Awaki, Keiji Ogi, Takashi Okajima, Peter J. Serlemitsos, Yang Soong, Kai Wing Chan, Yasushi Ogasaka, Takuya Miyazawa, Akihiro Furuzawa, Hideyo Kunieda, Yuzuru Tawara, Manabu Ishida, Yoshitomo Maeda, Hideyuki Mori, Kensuke Tamura, Proceedings of SPIE - The International Society for Optical Engineering, Proceedings of SPIE - The International Society for Optical Engineering, 2008, [Refereed], 0277-786X, 10.1117/12.788788
  • 2007/04, [Refereed], 0004-6264, 10.1093/pasj/59.2.299
  • 2007/01, [Refereed], 0004-6264, 10.1093/pasj/59.sp1.S1
  • 2007/01, [Refereed], 0004-6264, 10.1093/pasj/59.sp1.S215
  • 2007/01, [Refereed], 0004-6264, 10.1093/pasj/59.sp1.S141
  • 2007/01, [Refereed], 0004-6264, 10.1093/pasj/59.sp1.S177
  • 2007, [Refereed], 0375-9687
  • X-ray calibration of the telescope on board ASTRO-E satellite., R. Shibata, Manabu Ishida, H. Honda, T. Endo, J. Ishida, Hideyo Kunieda, Yuzuru Tawara, Akihiro Furuzawa, Y. Ogasaka, Manabu Watanabe, Kazutami Misaki, T. Yoshioka, P. J. Serlemitsos, Y. Soong, K.-W. Chan, Y. Terashima, S. Akao, Proc. SPIE, Proc. SPIE, 1998

Books etc

Conference Activities & Talks

  • 2020/03, 招待有り
  • 2019/12, 招待有り
  • 2019/03
  • 2019/03
  • 2019/03
  • 2019/03
  • Does the mid-infrared–hard X-ray luminosity relation for active galactic nuclei depend on Eddington ratio?, Toba, Y, Ueda, Y, Matsuoka, K, Shidatsu, M, Nagao, T, Terashima, Y, Wang, W, Chang, Y, 2019/03
  • 2019/01
  • 2019/01
  • 2019/01
  • 2018/09
  • 2018/09
  • MAXI Results of X-ray Binaries, Shidatsu Megumi, Time for Accretion, 2018/08, 招待有り, Sigtuna, Sweden
  • Rapid Optical Variability in the 2015 Outbursts of V404 Cygni, Kimura, Mariko, et al, Shidatsu, M, author out, 42nd COSPAR Scientific Assembly, 2018/07, Pasadena, California, USA
  • 2018/03
  • 2018/03
  • 2018/03
  • 2018/03
  • 2018/03
  • 2018/03
  • 2018/03
  • 2018/03
  • 2018/01
  • 2018/01
  • 2018/01
  • 2017/09
  • 2017/09
  • 2017/09
  • MAXI/GSC 7-year Source Catalog, Ueda, Y, Kawamuro, T, Hori. T, Shidatsu, M, Tanimoto, A, MAXI Team, The X-ray Universe 2017, 2017/06, Rome, Italy
  • 2017/03
  • 2017/03
  • 2017/03
  • NuSTAR and Swift observations of the ultraluminous X-ray source IC 342 X-1 in 2016, Shidatsu, M, Ultra-luminous X-ray Source Workshop, 2017/03, ISAS, Japan
  • 2017/01
  • 2017/01
  • MAXI Data Archive Plan, K. Ebisawa, S. Nahahira, Y. Sugawara, S. Ueno, H. Tomida, T. Furusho, T. Mihara, M. Sugizaki, M. Shidatsu, M. Serino, H. Negoro, Y. Nakagawa, L. Angelini, The 6th MAXI international conference "7 years of MAXI: monitoring X-ray transients", 2016/12, RIKEN, Japan
  • Hard X-ray Luminosity Function of Tidal Disruption Events: First Results from MAXI Extragalactic Survey, Taiki Kawamuro, Yoshihiro Ueda, Megumi Shidatsu, The 6th MAXI international conference "7 years of MAXI: monitoring X-ray transients", 2016/12, RIKEN, Japan
  • The MAXI/GSC catalog in the low Galactic-latitude sky, Takafumi Hori, Yoshihiro Ueda, Megumi Shidatsu, The 6th MAXI international conference "7 years of MAXI: monitoring X-ray transients", 2016/12, RIKEN, Japan
  • Violent Optical Variations and Correlation between Optical and X-ray Variability During the 2015 Outbursts in V404 Cygni, Mariko Kimura, Keisuke Isogai, Taichi Kato, Yoshihiro Ueda, Satoshi Nakahira, Megumi Shidatsu, The 6th MAXI international conference "7 years of MAXI: monitoring X-ray transients", 2016/12, RIKEN, Japan
  • MAXI/GSC 7-year all-sky map and studies of large-scale diffuse structures, Shidatsu, M, Ueda, Y, Kawamuro, T, The 6th MAXI international conference "7 years of MAXI: monitoring X-ray transients", 2016/12, RIKEN, Japan
  • 2016/09
  • 2016/09
  • An optically-thick disc wind in GRO J1655-40?, Shidatsu, M, Done, C, Y., Ueda, ULX and their environments, 2016/06, Strasbourg, France
  • 2016/03
  • 2016/03
  • 2016/03
  • 2016/03
  • 2016/01
  • 2015/09
  • Observations of Cyg X-3 with ASTRO-H, Magnus Axelesson, Megumi Shidatsu, The 6th ASTRO-H Summer Workshop, 2015/08, Nara Women's University, Japan
  • Broadband X-ray Study of the Galactic Black Hole Binary 4U 1630-47 with Suzaku, Takafumi Hori, Yoshihiro Ueda, Megumi Shidatsu, Chris Done, Aya Kubota, XMM-Newton Science Workshop "the Extremes of Black Hole Accretion", 2015/06, ESAC, Madrid, Spain
  • Optically thick disc wind in GRO J1655-40?, Shidatsu, M, Done, C, Y., Ueda, XMM-Newton Science Workshop "the Extremes of Black Hole Accretion", 2015/06, ESAC, Madrid, Spain
  • 2015/03
  • 2015/03
  • 2015/03
  • Suzaku Observation of the Black Hole Binary 4U 1630-47 in the Very High State, Takafumi Hori, Yoshihiro Ueda, Megumi Shidatsu, Taiki Kawamuro, Aya Kubota, Chris Done, Satoshi Nakahira, East Asian Young Astronomers Meeting 2015 (EAYAM 2015), 2015/02, Taipei, Taiwan
  • 2015/01
  • Wide-band X-ray Studies of Inner Disc Structure in Galactic Black Hole Binaries, Megumi Shidatsu, Yoshihiro Ueda, Takafumi Hori, Chris Done, Satoshi Nakahira, Swift: 10 years of discovery, 2014/12, La Sapienza Univ., Roma, Italy
  • 2014/09
  • 2014/09
  • 2014/09
  • 2014/09
  • 2014/03
  • 2014/03
  • 2014/03
  • 2014/03
  • 2014/03
  • A MAXI monitoring of long-term X-ray variability in Seyfert galaxies, Shiro Ueno, Ryosuke Sato, Yoshihiro Ueda, Kazuo Hiroi, Masaaki Hayashida, Megumi Shidatsu, Suzaku-MAXI conference: Expanding the Frontiers of the X-ray Universe, 2014/02, Ehime University, Japan
  • Mass-accretion inflow of a new black hole transient MAXI J1910-057, Satoshi NAKAHIRA, Hitoshi NEGORO, Megumi SHIDATSU, Yoshihiro UEDA, Tatehiro MIHARA, Masaru MATSUOKA, Suzaku-MAXI conference: Expanding the Frontiers of the X-ray Universe, 2014/02, Ehime University, Japan
  • MAXI obvserves black-hole X-ray novae from the beginning to the end, Hitoshi Negoro, Satoshi Nakahira, Yoshihiro Ueda, Megumi Shidatsu, Kazutaka Yamaoka, Nobuyuki Kawai, Masaru Matsuoka, the MAXI team, Suzaku-MAXI conference: Expanding the Frontiers of the X-ray Universe, 2014/02, Ehime University, Japan
  • Suzaku observation of 4U1630-47 in the very high state, Takafumi Hori, Yoshihiro Ueda, Megumi Shidatsu, Suzaku-MAXI conference: Expanding the Frontiers of the X-ray Universe, 2014/02, Ehime University, Japan
  • Accretion disk and peculiar ionized absorber of the 9.7-hour dipping black hole binary MAXI J1305-704, Megumi Shidatsu, Yoshihiro Ueda, Satoshi Nakahira, Suzaku-MAXI conference: Expanding the Frontiers of the X-ray Universe, 2014/02, Ehime University, Japan
  • 2014/01
  • 2014/01
  • 2014/01
  • 2013/09
  • On the Nature of Accretion Disk, Dip and Ionized Absorber of MAXI J1305-704, Megumi Shidatsu, Yoshihiro Ueda, Black Hole (g)Astronomy: exploring the different flavours of accretion, 2013/09, Brindisi, Italy
  • 2013/03
  • 2013/03
  • 2013/03
  • 2013/03
  • 2013/03
  • 2013/03
  • On the nature of the newly discovered black hole candidate MAXI J1305-704, Megumi Shidatsu, Yoshihiro Ueda, Satoshi Nakahira, 2012 GCOE symposium, 2013/02, Kyoto University, Japan
  • 2013/01
  • 2013/01
  • 2012/09
  • 3 years all-sky X-ray observations with MAXI, Negoro, Hitoshi, et al, Shidatsu, M, s, h author out, HALF A CENTURY OF X-RAY ASTRONOMY, 2012/09, Mykonos island, Greece
  • MAXI Extragalactic Survey, Hiroi K, Ueda Y, Shidatsu M, HALF A CENTURY OF X-RAY ASTRONOMY, 2012/09, Mykonos island, Greece
  • Wide-band and High-resolution Spectroscopy of Black Hole Binaries with ASTRO-H, Megumi Shidatsu, Yoshihiro Ueda, 3rd ASTRO-H Summer Workshop, 2012/08, Kyoto, Japan
  • 2012/06
  • 2012/06
  • 2012/03
  • 2012/03
  • 2012/03
  • 2011/09
  • 2011/09
  • Detailed Spectroscopy of Black Hole Binaries with ASTRO-H, Megumi Shidatsu, Yoshihiro Ueda, Astro-H Summer Workshop for Science, 2011/08, Atami, Japan
  • Suzaku Observations of GX 339-4 in the Low/Hard State, Ueda, Y, Shidatsu, M, The X-ray Universe 2011, 2011/06, Berlin, Germany
  • 2011/03
  • X-ray and Near-infrared Observations of the Black Hole Candidate GX 339-4 with Suzaku and IRSF, Shidatsu, M, Ueda, Y, Tazaki, F, GCOE Symposium: Emerging Frontiers of Physics, 2011/02
  • “X-ray and Near-infrared Observations of the Black Hole Candidate GX 339-4, Shidatsu, M, Ueda, Y, Tazaki, F, The first year of MAXI: Monitoring variable X-ray sources -4th International MAXI Workshop-, 2010/11
  • Suzaku Observations of the Galactic Black Hole Candidate GX 339-4 and Science on Black Hole X-ray Binaries with ASTRO-H, Megumi Shidatsu, Yoshihiro Ueda, Astro-H Summer Workshop for Science, 2010/08

Misc

  • The FORCE mission : Science aim and instrument parameter for broadband X-ray imaging spectroscopy with good angular resolution, Kazuhiro Nakazawa, Koji Mori, Takeshi G. Tsuru, Yoshihiro Ueda, Hisamitsu Awaki, Yasushi Fukazawa, Manabu Ishida, Hironori Matsumoto, Hiroshi Murakami, Takashi Okajima, Tadayuki Takahashi, Hiroshi Tsunemi, William W. Zhang, Proc. SPIE 10699, 2018, Proc. SPIE 10699, 2018, 2018/07, 10.1117/12.2309344, http://arxiv.org/abs/1807.11175v1, FORCE is a 1.2 tonnes small mission dedicated for wide-band fine-imaging<br /> x-ray observation. It covers from 1 to 80 keV with a good angular resolution of<br /> $15&quot;$ half-power-diameter. It is proposed to be launched around mid-2020s and<br /> designed to reach a limiting sensitivity as good as $F_X (10-40~{\rm keV}) = 3<br /> \times 10^{-15}$~erg cm$^{-2}$ s$^{-1}$ keV$^{-1}$ within 1~Ms. This number is<br /> one order of magnitude better than current best one. With its high-sensitivity<br /> wide-band coverage, FORCE will probe the new science field of &quot;missing BHs&quot;,<br /> searching for families of black holes of which populations and evolutions are<br /> not well known. Other point-source and diffuse-source sciences are also<br /> considered. FORCE will also provide the &quot;hard x-ray coverage&quot; to forthcoming<br /> large soft x-ray observatories.
  • Soft x-ray imaging telescope (Xtend) onboard X-ray Astronomy Recovery Mission (XARM), Kiyoshi Hayashida, Hiroshi Tomida, Koji Mori, Hiroshi Nakajima, Takaaki Tanaka, Hiroyuki Uchida, Takeshi G. Tsuru, Hiroshi Murakami, Takashi Okajima, Takayoshi Kohmura, Kouichi Hagino, Shogo B. Kobayashi, Manabu Ishida, Yoshitomo Maeda, Hideki Uchiyama, Kazutaka Yamaoka, Hironori Matsumoto, Masayoshi Nobukawa, Kumiko K, Nobukawa, Junko S. Hiraga, Makoto Yamauchi, Isamu Hatsukade, Yang Soong, Hideyuki Mori, Takayuki Hayashi, Hiroshi Tsunemi, Masanobu Ozaki, Tadayasu Dotani, Junichi Iwagaki, Tomokage Yoneyama, Koki Okazaki, Kazunori Asakura, Satomi Onishi, Yoshiaki Kanemaru, Jin Sato, Yusuke Nishioka, Ayaki Takeda, Hiromichi Okon, Masayuki Yoshida, Takeo Shimoi, Proceedings of SPIE - The International Society for Optical Engineering, Proceedings of SPIE - The International Society for Optical Engineering, 10699, 2018/01, 0277-786X, 10.1117/12.2311446, https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85051869685&origin=inward, © 2018 SPIE. X-ray Astronomy Recovery Mission (XARM) scheduled to be launched in early 2020&#039;s carries two soft X-ray telescopes. One is Resolve consisting of a soft X-ray mirror and a micro calorimeter array, and the other is Soft X-ray Imaging Telescope (Xtend), a combination of an X-ray mirror assembly (XMA) and an X-ray CCD camera (SXI). Xtend covers a field of view (FOV) of 38′ × 38′, much larger than that of Resolve (3′ × 3 ′) with moderate energy resolution in the energy band from 0.4 keV to 13 keV, which is similar to that of Resolve (from 0.3 keV to 12 keV). Simultaneous observations of both telescopes provide complimentary data of X-ray sources in their FOV. In particular, monitoring X-ray sources outside the Resolve FOV but inside the Xtend FOV is important to enhance the reliability of super high resolution spectra obtained with Resolve. Xtend is also expected to be one of the best instruments for low surface brightness X-ray emissions with its low non X-ray background level, which is comparable to that of Suzaku XIS. The design of Xtend is almost identical to those of Soft X-ray Telescope (SXT) and Soft X-ray Imager (SXI) both on board the Hitomi satellite. However, several mandatory updates are included. Updates for the CCD chips are verified with experiment using test CCD chips before finalizing the design of the flight model CCD. Fabrication of the foils for XMA has started, and flight model production of the SXI is almost ready.
  • X-ray Measurements of the Particle Acceleration Properties at Inward Shocks in Cassiopeia A, Toshiki Sato, Satoru Katsuda, Mikio Morii, Aya Bamba, John, P. Hughes, Yoshitomo Maeda, Manabu Ishida, Federico Fraschetti, 2017/10, 10.3847/1538-4357/aaa021, http://arxiv.org/abs/1710.06992v2, We present new evidence that the bright non-thermal X-ray emission features<br /> in the interior of the Cassiopeia A supernova remnant (SNR) are caused by<br /> inward moving shocks based on Chandra and NuSTAR observations. Several bright<br /> inward-moving filaments were identified using monitoring data taken by Chandra<br /> in 2000-2014. These inward-moving shock locations are nearly coincident with<br /> hard X-ray (15-40 keV) hot spots seen by NuSTAR. From proper motion<br /> measurements, the transverse velocities were estimated to be in the range<br /> $\sim$2,100-3,800 km s$^{-1}$ for a distance of 3.4 kpc. The shock velocities<br /> in the frame of the expanding ejecta reach values of $\sim$5,100-8,700 km<br /> s$^{-1}$, slightly higher than the typical speed of the forward shock.<br /> Additionally, we find flux variations (both increasing and decreasing) on<br /> timescales of a few years in some of the inward-moving shock filaments. The<br /> rapid variability timescales are consistent with an amplified magnetic field of<br /> $B \sim$ 0.5-1 mG. The high speed and low photon cut-off energy of the<br /> inward-moving shocks are shown to imply a particle diffusion coefficient that<br /> departs from the Bohm regime ($k_0 = D_0/D_{\rm 0,Bohm} \sim$ 3-8) for the few<br /> simple physical configurations we consider in this study. The maximum electron<br /> energy at these shocks is estimated to be $\sim$8-11 TeV, smaller than the<br /> values of $\sim$15-34 TeV inferred for the forward shock. Cassiopeia A is<br /> dynamically too young for its reverse shock to appear to be moving inward in<br /> the observer frame. We propose instead that the inward-moving shocks are a<br /> consequence of the forward shock encountering a density jump of $\gtrsim$ 5-8<br /> in the surrounding material.
  • 66, 3, 2014/02, 0004-6264, 10.1093/pasj/psu031, http://arxiv.org/abs/1402.0603v1
  • 66, 1, 2014/02, 0004-6264, 10.1093/pasj/pst027, http://arxiv.org/abs/1310.4244v1
  • 9144, 2014, 0277-786X, 10.1117/12.2056804
  • 8443, 2012, 0277-786X, 10.1117/12.926190, http://arxiv.org/abs/1210.4378v1
  • 2011/12, 10.1088/0004-637X/746/2/134, http://arxiv.org/abs/1112.0822v1
  • 62, 5, 1301, 1306, 2010/10, 0004-6264, 10.1093/pasj/62.5.1301, http://arxiv.org/abs/1007.4393v1
  • 62, 5, L33, L36, 2010/10, 0004-6264, 10.1093/pasj/62.5.L33, http://arxiv.org/abs/1008.0234v2
  • 7732, 2010, 0277-786X, 10.1117/12.857875, http://arxiv.org/abs/1010.4972v1
  • 48, 19, 3830, 3838, 2009/07, 1559-128X, 10.1364/AO.48.003830, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=67749111623&origin=inward
  • 61, S197, S207, 2009/01, 0004-6264, 10.1093/pasj/61.sp1.S197, http://arxiv.org/abs/0808.2339v2
  • 7011, 2008, 0277-786X, 10.1117/12.788736
  • 7011, 2008, 0277-786X, 10.1117/12.789599
  • 7011, 2008, 0277-786X, 10.1117/12.789184
  • Suzaku Discovery of Hard X-ray Pulsations from the Rotating Magnetized White Dwarf, AE Aquarii, Yukikatsu Terada, Takayuki Hayashi, Manabu Ishida, Koji Mukai, Tadayas u Dotani, Shunsaku Okada, Ryoko Nakamura, Sachindra Naik, Aya Bamba, Kazuo Makishima, 2007/11, 10.1093/pasj/60.2.387, http://arxiv.org/abs/0711.2716v2, The fast rotating magnetized white dwarf, AE Aquarii, was observed with<br /> Suzaku, in October 2005 and October 2006 with exposures of 53.1 and 42.4 ks,<br /> respectively. In addition to clear spin modulation in the 0.5--10 keV band of<br /> the XIS data at the barycentric period of 33.0769 \pm 0.0001 s, the 10--30 keV<br /> HXD data in the second half of the 2005 observation also showed statistically<br /> significant periodic signals at a consistent period. On that occasion, the<br /> spin-folded HXD light curve exhibited two sharp spikes separated by about 0.2<br /> cycles in phase, in contrast to approximately sinusoidal profiles observed in<br /> energies below about 4 keV. The folded 4--10 keV XIS light curves are<br /> understood as a superposition of those two types of pulse profiles. The phase<br /> averaged 1.5--10 keV spectra can be reproduced by two thermal components with<br /> temperatures of $2.90_{-0.16}^{+0.20}$ keV and $0.53_{-0.13}^{+0.14}$ keV, but<br /> the 12-25 keV HXD data show a significant excess above the extrapolated model.<br /> This excess can be explained by either a power-law model with photon index of<br /> $1.12_{-0.62}^{+0.63}$ or a third thermal component with a temperature of<br /> $54_{-47}^{+26}$ keV. At a distance of 102 pc, the 4--30 keV luminosities of<br /> the thermal and the additional components become $1.7_{-0.6}^{+1.3}$ and<br /> $5.3_{-0.3}^{+15.3} \times 10^{29}$ erg s$^{-1}$, respectively. The latter<br /> corresponds to 0.09% of the spin down energy of the object. Possible emission<br /> mechanisms of the hard pulsations are discussed, including in particular<br /> non-thermal ones.
  • The Suzaku high resolution X-ray spectrometer, Richard L. Kelley, Kazuhisa Mitsuda, Christine A. Allen, Petar Arsenovic, Michael D. Audley, Thomas G. Bialas, Kevin R. Boyce, Robert F. Boyle, Susan R. Breon, Gregory V. Brown, Jean Cottam, Michael J. Dipirro, Ryuichi Fujimoto, Tae Furusho, Keith C. Gendreau, Gene G. Gochar, Oscar Gonzalez, Masayuki Hirabayashi, Stephen S. Holt, Hajime Inoue, Manabu Ishida, Yoshitaka Ishisaki, Carol S. Jones, Ritva Keski-Kuha, Caroline A. Kilbourne, Dan McCammon, Umeyo Morita, S. Harvey Moseley, Brent Mott, Katsuhiro Narasaki, Yoshiaki Ogawara, Takaya Ohashi, Naomi Ota, John S. Panek, F. Scott Porter, Aristides Serlemitsos, Peter J. Shirron, Gary A. Sneiderman, Andrew E. Szymkowiak, Yoh Takei, June L. Tveekrem, Stephen M. Volz, Mikio Yamamoto, Noriko Y. Yamasaki, Publications of the Astronomical Society of Japan, Publications of the Astronomical Society of Japan, 59, 2007/04, 0004-6264, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34047141014&origin=inward, The X-Ray Spectrometer (XRS) has been designed to provide the Suzaku Observatory with non-dispersive, high-resolution X-ray spectroscopy. As designed, the instrument covers the energy range 0.3 to 12keV, which encompasses the most diagnostically rich part of the X-ray band. The sensor consists of a 32-channel array of X-ray microcalorimeters, each with an energy resolution of about 6 eV. The very low temperature required for operation of the array (60 mK) is provided by a four-stage cooling system containing a single-stage adiabatic demagnetization refrigerator, a superfluid-helium cryostat, a solid-neon dewar, and a single-stage, Stirling-cycle cooler. The Suzaku/XRS is the first orbiting X-ray microcalorimeter spectrometer and was designed to last more than three years in orbit. The early verification phase of the mission demonstrated that the instrument worked properly and that the cryogen consumption rate was low enough to ensure a mission lifetime exceeding 3 years. However, the liquid-He cryogen was completely vaporized two weeks after opening the dewar guard vacuum vent. The problem has been traced to inadequate venting of the dewar He and Ne gases out of the spacecraft and into space. In this paper we present the design and ground testing of the XRS instrument, and then describe the in-flight performance. An energy resolution of 6 eV was achieved during pre-launch tests and a resolution of 7 eV was obtained in orbit. The slight degradation is due to the effects of cosmic rays. © 2007. Astronomical Society of Japan.
  • 58, 4, 695, 702, 2006/08, 0004-6264, 10.1093/pasj/58.4.695, http://ci.nii.ac.jp/naid/10023942315
  • 54, 3, 327, 352, 2002/06, 0004-6264, 10.1093/pasj/54.3.327, http://arxiv.org/abs/astro-ph/0204224v3

Other Research Activities

Awards & Honors

Activity track record

Educational activities

Course in charge

  • 2019, the first semester, under graduate, 物理学実験Ⅱ
  • 2019, the first semester, under graduate, 卒業研究Ⅰ
  • 2019, the first semester, under graduate, 卒業研究Ⅱ


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