The Hitomi (ASTRO-H) hard X-ray telescope (HXT): Current status of calibration

Hisamitsu Awaki, Hironori Matsumoto, Manabu Ishida, Akihiro Furuzawa, Shigeo Yamauchi, Yoshitomo Maeda, Hideyo Kunieda, Yoshito Haba, Takayuki Hayashi, Ryo Iizuka, Kazunori Ishibashi, Ikuyuki Mitsuishi, Takuya Miyazawa, Hideyuki Mori, Takashi Okajima, Satoshi Sugita, Keisuke Tamura, Yuzuru Tawara, Tessei Yoshida

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

4 被引用数 (Scopus)

抄録

The Japanese X-ray Astronomy Satellite, Hitomi (ASTRO-H) carried two hard X-ray telescopes (HXT), covering the energy band from 5 keV to 80 keV. In the initial functional verification phase of the onboard instruments, G21.5-0.9 and Crab nebula were observed with HXT. The data of G21.5-0.9 observation indicated that the hard X-ray imaging system worked well. Detail calibration of the Hitomi HXTs was performed with the observation data of Crab nebula. We extracted X-ray images of the Crab pulsar excluding the nebular emission, and confirmed that the imaging performance in orbit was satisfied with the requirement of the HXT. The 8-80 keV Crab spectrum was well fitted with a power-law model with the absorbed column of NH=3×1021 cm-2. The estimated photon index of 2.122±0.003 was consistent with previous results of Crab observation, while the observed 2-10 keV flux of 2.3×10-8 erg s-1 cm-2 was slightly larger than the previous observation. We note that there was discrepancy between the simulated and the measured effective area on ground. Thus, we introduced a fudge factor to reproduce the effective area obtained in the ground calibration. The fudge factor of HXTs are included in the latest calibration database of Hitomi.

本文言語英語
ホスト出版物のタイトルOptics for EUV, X-Ray, and Gamma-Ray Astronomy VIII
編集者Stephen L. O'Dell, Giovanni Pareschi
出版社SPIE
ISBN(電子版)9781510612556
DOI
出版ステータス出版済み - 2017
外部発表はい
イベントOptics for EUV, X-Ray, and Gamma-Ray Astronomy VIII 2017 - San Diego, 米国
継続期間: 08-08-201710-08-2017

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
10399
ISSN(印刷版)0277-786X
ISSN(電子版)1996-756X

その他

その他Optics for EUV, X-Ray, and Gamma-Ray Astronomy VIII 2017
国/地域米国
CitySan Diego
Period08-08-1710-08-17

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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