18 July 2016 Soft x-ray imager (SXI) onboard ASTRO-H
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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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hiroshi Tsunemi, Hiroshi Tsunemi, Kiyoshi Hayashida, Kiyoshi Hayashida, Takeshi Go Tsuru, Takeshi Go Tsuru, Tadayasu Dotani, Tadayasu Dotani, Hiroshi Nakajima, Hiroshi Nakajima, Naohisa Anabuki, Naohisa Anabuki, Ryo Nagino, Ryo Nagino, Takaaki Tanaka, Takaaki Tanaka, Hiroyuki Uchida, Hiroyuki Uchida, Masanobu Ozaki, Masanobu Ozaki, Chikara Natsukari, Chikara Natsukari, Hiroshi Tomida, Hiroshi Tomida, Shutaro Ueda, Shutaro Ueda, Masachika Iwai, Masachika Iwai, Masayoshi Nobukawa, Masayoshi Nobukawa, Junko S. Hiraga, Junko S. Hiraga, Takayoshi Kohmura, Takayoshi Kohmura, Hiroshi Murakami, Hiroshi Murakami, Koji Mori, Koji Mori, Makoto Yamauchi, Makoto Yamauchi, Isamu Hatsukade, Isamu Hatsukade, Yusuke Nishioka, Yusuke Nishioka, Aya Bamba, Aya Bamba, Kumiko K. Nobukawa, Kumiko K. Nobukawa, John Doty, John Doty, "Soft x-ray imager (SXI) onboard ASTRO-H", Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 990510 (18 July 2016); doi: 10.1117/12.2230672; https://doi.org/10.1117/12.2230672


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