@article{747d70167b3c4e2a987f24f6bc456aa6,
title = "In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H)",
abstract = "We describe the in-orbit performance of the soft X-ray imaging system consisting of the Soft X-ray Telescope and the Soft X-ray Imager aboard Hitomi. Verification and calibration of imaging and spectroscopic performance are carried out, making the best use of the limited data of less than three weeks. Basic performance, including a large field of view of 38 × 38, is verified with the first-light image of the Perseus cluster of galaxies. Amongst the small number of observed targets, the on-minus-off pulse image for the out-of-time events of the Crab pulsar enables us to measure the half-power diameter of the telescope as ∼1.3. The average energy resolution measured with the onboard calibration source events at 5.89 keV is 179 ± 3 eV in full width at half maximum. Light leak and crosstalk issues affected the effective exposure time and the effective area, respectively, because all the observations were performed before optimizing an observation schedule and the parameters for the dark-level calculation. Screening the data affected by these two issues, we measure the background level to be 5.6 × 10−6 counts s−1 arcmin−2 cm−2 in the energy band of 5–12 keV, which is seven times lower than that of the Suzaku XIS-BI.",
author = "Hiroshi Nakajima and Yoshitomo Maeda and Hiroyuki Uchida and Takaaki Tanaka and Hiroshi Tsunemi and Kiyoshi Hayashida and Tsuru, {Takeshi G.} and Tadayasu Dotani and Ryo Nagino and Shota Inoue and Masanobu Ozaki and Hiroshi Tomida and Chikara Natsukari and Shutaro Ueda and Koji Mori and Makoto Yamauchi and Isamu Hatsukade and Yusuke Nishioka and Miho Sakata and Tatsuhiko Beppu and Daigo Honda and Masayoshi Nobukawa and Hiraga, {Junko S.} and Takayoshi Kohmura and Hiroshi Murakami and Nobukawa, {Kumiko K.} and Aya Bamba and Doty, {John P.} and Ryo Iizuka and Toshiki Sato and Sho Kurashima and Nozomi Nakaniwa and Ryota Asai and Manadu Ishida and Hideyuki Mori and Yang Soong and Takashi Okajima and Peter Serlemitsos and Yuzuru Tawara and Ikuyuki Mitsuishi and Kazunori Ishibashi and Keisuke Tamura and Takayuki Hayashi and Akihiro Furuzawa and Satoshi Sugita and Takuya Miyazawa and Hisamitsu Awaki and Miller, {Eric D.} and Hiroya Yamaguchi",
note = "Funding Information: We would like to express our appreciation for the tremendous efforts by Yu Shiodome, Kentaro Someya, Takuro Sato, Ko Ichihara, Kazuki Tomikawa, Naomichi Kikuchi (ISAS/JAXA), Ikuya Sakurai, Yuhki Kurebayashi (Nagoya University), Sari Minami (Nara Women{\textquoteright}s University), Takanori Izumiya, Takashi Awaya, Kota Okada (Chuo University), Naohisa Anabuki, Shuhei Katada (Osaka University), Ryosaku Washino (Kyoto University), Eri Isoda (University of Miyazaki), Tahir Yaqoob (University of Maryland Baltimore County), and Lorella Angelini (NASA/GSFC) in the development and calibration of the SXT-I and the SXI. S. Inoue, K. K. Nobukawa, and T. Sato are supported by the Research Fellow of JSPS for Young Scientists. This work is supported by JSPS KAKENHI Grant Numbers JP14079204, JP15H02070, JP15H02090, JP15H03641, JP15J01845, JP15K17610, JP16H00949, JP16H03983, JP16K13787, JP14079204, JP17K14289, JP18740110, JP20365505, JP20549005, JP21659292, JP23000004, JP23340071, JP23540280, JP23740199, JP24684010, JP24740123, JP25105516, JP25109004, JP25870181, JP26109506, Funding Information: We would like to express our appreciation for the tremendous efforts by Yu Shiodome, Kentaro Someya, Takuro Sato, Ko Ichihara, Kazuki Tomikawa, Naomichi Kikuchi (ISAS/JAXA), Ikuya Sakurai, Yuhki Kurebayashi (Nagoya University), Sari Minami (Nara Women?s University), Takanori Izumiya, Takashi Awaya, Kota Okada (Chuo University), Naohisa Anabuki, Shuhei Katada (Osaka University), Ryosaku Washino (Kyoto University), Eri Isoda (University of Miyazaki), Tahir Yaqoob (University of Maryland Baltimore County), and Lorella Angelini (NASA/GSFC) in the development and calibration of the SXT-I and the SXI. S. Inoue, K. K. Nobukawa, and T. Sato are supported by the Research Fellow of JSPS for Young Scientists. This work is supported by JSPS KAKENHI Grant Numbers JP14079204, JP15H02070, JP15H02090, JP15H03641, JP15J01845, JP15K17610, JP16H00949, JP16H03983, JP16K13787, JP14079204, JP17K14289, JP18740110, JP20365505, JP20549005, JP21659292, JP23000004, JP23340071, JP23540280, JP23740199, JP24684010, JP24740123, JP25105516, JP25109004, JP25870181, JP26109506, JP26670560, JP26800102, and JP26800144. T. Dotani acknowledges support from the Grant-in-Aid for Scientific Research on Innovative Areas ?Nuclear Matter in Neutron Stars Investigated by Experiments and Astronomical Observations.? Publisher Copyright: {\textcopyright} The Author 2017.",
year = "2018",
month = mar,
day = "1",
language = "English",
volume = "70",
journal = "Publication of the Astronomical Society of Japan",
issn = "0004-6264",
publisher = "Astronomical Society of Japan",
number = "2",
}