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

doi:10.1117/12.2272844

29 August 2017 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

Author Affiliations +

Proceedings Volume 10399, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VIII; 103990R (2017) https://doi.org/10.1117/12.2272844
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

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 N_H=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.

Conference Presentation

Citation Download Citation

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, and Tessei Yoshida "The Hitomi (ASTRO-H) hard x-ray telescope (HXT): current status of calibration", Proc. SPIE 10399, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VIII, 103990R (29 August 2017); https://doi.org/10.1117/12.2272844

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available