Initial operations of the Soft X-ray Imager onboard XRISM
Abstract
XRISM (X-Ray Imaging and Spectroscopy Mission) is an astronomical satellite with the capability of high-resolution spectroscopy with the X-ray microcalorimeter, Resolve, and wide field-of-view imaging with the CCD camera, Xtend. Xtend consists of the mirror assembly (XMA: X-ray Mirror Assembly) and detector (SXI: Soft X-ray Imager). The SXI is composed of CCDs, analog and digital electronics, and a mechanical cooler. After the successful launch on September 6th, 2023 (UT) and subsequent critical operations, the mission instruments were turned on and set up. The CCDs have been kept at the designed operating temperature of C after the electronics and cooling system were successfully set up. During the initial operation phase, which continued for more than a month after the critical operations, we verified the observation procedure, stability of the cooling system, all the observation options with different imaging areas and/or timing resolutions, and time-tagged and automated operations including those for South Atlantic Anomaly passages. We optimized the operation procedure and observation parameters including the cooler settings, imaging areas for the small window modes, and event selection algorithm. We summarize our policy and procedure of the initial operations for the SXI. We also report on a couple of issues we faced during the initial operations and lessons learned from them.
Cite
@article{arxiv.2406.19910,
title = {Initial operations of the Soft X-ray Imager onboard XRISM},
author = {Hiromasa Suzuki and Tomokage Yoneyama and Shogo B. Kobayashi and Hirofumi Noda and Hiroyuki Uchida and Kumiko K. Nobukawa and Kouichi Hagino and Koji Mori and Hiroshi Tomida and Hiroshi Nakajima and Takaaki Tanaka and Hiroshi Murakami and Hideki Uchiyama and Masayoshi Nobukawa and Yoshiaki Kanemaru and Yoshinori Otsuka and Haruhiko Yokosu and Wakana Yonemaru and Hanako Nakano and Kazuhiro Ichikawa and Reo Takemoto and Tsukasa Matsushima and Marina Yoshimoto and Mio Aoyagi and Kohei Shima and Yuma Aoki and Yamato Ito and Kaito Fukuda and Honoka Kiyama and Daiki Aoki and Kaito Fujisawa and Yasuyuki Shimizu and Mayu Higuchi and Masahiro Fukuda and Natsuki Sakamoto and Ryuichi Azuma and Shun Inoue and Takayoshi Kohmura and Makoto Yamauchi and Isamu Hatsukade and Hironori Matsumoto and Hirokazu Odaka and Tsunefumi Mizuno and Tessei Yoshida and Yoshitomo Maeda and Manabu Ishida and Takeshi G. Tsuru and Kazutaka Yamaoka and Takashi Okajima and Takayuki Hayashi and Junko S. Hiraga and Masanobu Ozaki and Tadayasu Dotani and Hiroshi Tsunemi and Kiyoshi Hayashida},
journal= {arXiv preprint arXiv:2406.19910},
year = {2025}
}
Comments
14 pages, 8 figures, accepted for publication in JATIS