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Proceedings Paper

Soft x-ray imager (SXI) onboard ASTRO-H
Author(s): Hiroshi Tsunemi; Kiyoshi Hayashida; Takeshi Go Tsuru; Tadayasu Dotani; Hiroshi Nakajima; Naohisa Anabuki; Ryo Nagino; Takaaki Tanaka; Hiroyuki Uchida; Masanobu Ozaki; Chikara Natsukari; Hiroshi Tomida; Shutaro Ueda; Masachika Iwai; Masayoshi Nobukawa; Junko S. Hiraga; Takayoshi Kohmura; Hiroshi Murakami; Koji Mori; Makoto Yamauchi; Isamu Hatsukade; Yusuke Nishioka; Aya Bamba; Kumiko K. Nobukawa; John Doty
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Paper Abstract

We report here the performance of the SXI on ASTRO-H that was started its operation from March,02 2016. The SXI consists of 4 CCDs that cover 38' X 38' sky region. They are P-channel back-illumination type CCD with a depletion layer of 200 μm. Charge injection (CI) method is applied from its beginning of the mission. Two single stage sterling coolers are equipped with the SXI while one of them has enough power to cool the CCD to -110°C. There are two issues in the SXI performance: one is a light-leak and the other is a cosmic-ray echo. The light-leak is due to the fact that the day-Earth irradiates visible lights onto the SXI body through holes in the satellite base plate. It can be avoided by selecting targets not on the anti-day-Earth direction. The cosmic-ray echo is due to the improper parameter values that is fixed by revising them with which the cosmic-ray echo does not affect the image. Using the results of RXJ1856.5-3754, we confirm that the possible contaminants on the CCD is well within our expectation.

Paper Details

Date Published: 18 July 2016
PDF: 11 pages
Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 990510 (18 July 2016); doi: 10.1117/12.2230672
Show Author Affiliations
Hiroshi Tsunemi, Osaka Univ. (Japan)
Kiyoshi Hayashida, Osaka Univ. (Japan)
Takeshi Go Tsuru, Kyoto Univ. (Japan)
Tadayasu Dotani, Institute of Space and Astronautical Science, JAXA (Japan)
Hiroshi Nakajima, Osaka Univ. (Japan)
Naohisa Anabuki, Osaka Univ. (Japan)
Ryo Nagino, Osaka Univ. (Japan)
Takaaki Tanaka, Kyoto Univ. (Japan)
Hiroyuki Uchida, Kyoto Univ. (Japan)
Masanobu Ozaki, Institute of Space and Astronautical Science, JAXA (Japan)
Chikara Natsukari, Institute of Space and Astronautical Science, JAXA (Japan)
Hiroshi Tomida, Institute of Space and Astronautical Science, JAXA (Japan)
Shutaro Ueda, Institute of Space and Astronautical Science, JAXA (Japan)
Masachika Iwai, Institute of Space and Astronautical Science, JAXA (Japan)
Masayoshi Nobukawa, Nara Univ. of Education (Japan)
Junko S. Hiraga, Kwansei Gakuin Univ. (Japan)
Takayoshi Kohmura, Tokyo Univ. of Science (Japan)
Hiroshi Murakami, Tohoku Gakuin Univ. (Japan)
Koji Mori, Univ. of Miyazaki (Japan)
Makoto Yamauchi, Univ. of Miyazaki (Japan)
Isamu Hatsukade, Univ. of Miyazaki (Japan)
Yusuke Nishioka, Univ. of Miyazaki (Japan)
Aya Bamba, Aoyama Gakuin Univ. (Japan)
Kumiko K. Nobukawa, Nara Women's Univ. (Japan)
John Doty, Noqsi Aerospace, Ltd. (United States)


Published in SPIE Proceedings Vol. 9905:
Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Tadayuki Takahashi; Marshall Bautz, Editor(s)

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