First result from a ground calibration of the Hard X-ray Telescope (HXT) onboard ASTRO-H satellite

Takuya Miyazawa; Naoki Ishida; Hiroyoshi Kato; Tadatsugu Demoto; Yuuji Kuroda; Shunya Takizawa; Fumiya Shimasaki; Yusuke Miyata; Toshihiro Iwase; Sasagu Tachibana; Shigetaka Saji; Yasunori Babazaki; Hideyuki Mori; Keisuke Tamura; Yoshito Haba; Kazunori Ishibashi; Hironori Matsumoto; Yuzuru Tawara; Hideyo Kunieda; Yoshitomo Maeda; Manabu Ishida; Daisen Kurihara; Satoshi Sugita; Hisamitsu Awaki; Kentaro Uesugi; Yoshio Suzuki

doi:10.1117/12.2024764

26 September 2013 First result from a ground calibration of the Hard X-ray Telescope (HXT) onboard ASTRO-H satellite

Takuya Miyazawa, Naoki Ishida, Hiroyoshi Kato, Tadatsugu Demoto, Yuuji Kuroda, Shunya Takizawa, Fumiya Shimasaki, Yusuke Miyata, Toshihiro Iwase, Sasagu Tachibana, Shigetaka Saji, Yasunori Babazaki, Hideyuki Mori, Keisuke Tamura, Yoshito Haba, Kazunori Ishibashi, Hironori Matsumoto, Yuzuru Tawara, Hideyo Kunieda, Yoshitomo Maeda, Manabu Ishida, Daisen Kurihara, Satoshi Sugita, Hisamitsu Awaki, Kentaro Uesugi, Yoshio Suzuki

Author Affiliations +

Proceedings Volume 8861, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VI; 88610I (2013) https://doi.org/10.1117/12.2024764
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

We report a first result from a ground-based X-ray calibration of the ASTRO-H Hard X-ray Telescope (HXT) at a synchrotron radiation facility SPring-8. ASTRO-H, to be launched in 2015, is Japan’s sixth X-ray satellite mission following to Suzaku satellite. One of the features of ASTRO-H is a simultaneous observation between 0.3 keV to 600 keV with several instruments. ASTRO-H will carry two HXTs to cover hard x-rays up to 80 keV. HXT, which is one of the key instruments in ASTRO-H, is the conically approximated Wolter-I grazing incidence optics similar to the Suzaku X-ray telescope. Reflector surfaces are coated with depth-graded Platinum and Carbon multilayer to reflect hard X-rays efficiently. The integrations of the flight optics of HXT-1 and HXT- 2 were completed, and we performed a ground calibration of HXT-1 at a synchrotron facility, SPring-8 beamline BL20B2 to build a response function of HXT. We use a raster scan method with a pencil beam at the baseline length of 215m. A point spread function and effective area were measured at 30, 40, 50, 60, 70keV. From a preliminary analysis of the data, an angular resolution of 1.5 - 1.9 arcmin. was obtained at five energy band in the full telescope. The effective area is 170 cm² at 30 keV and 82 cm² at 50 keV, respectively. The effective area at 30 and 50 keV are about 13 % and 50 % larger than expected, respectively. We also measured the stray light from outside of field of view at 12’ and 20’ of-axis angle. We confirmed the effectiveness of pre-collimator to reduce the stray lights.

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Takuya Miyazawa, Naoki Ishida, Hiroyoshi Kato, Tadatsugu Demoto, Yuuji Kuroda, Shunya Takizawa, Fumiya Shimasaki, Yusuke Miyata, Toshihiro Iwase, Sasagu Tachibana, Shigetaka Saji, Yasunori Babazaki, Hideyuki Mori, Keisuke Tamura, Yoshito Haba, Kazunori Ishibashi, Hironori Matsumoto, Yuzuru Tawara, Hideyo Kunieda, Yoshitomo Maeda, Manabu Ishida, Daisen Kurihara, Satoshi Sugita, Hisamitsu Awaki, Kentaro Uesugi, and Yoshio Suzuki "First result from a ground calibration of the Hard X-ray Telescope (HXT) onboard ASTRO-H satellite", Proc. SPIE 8861, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VI, 88610I (26 September 2013); https://doi.org/10.1117/12.2024764

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