In-orbit calibration of the hard x-ray detector (HXD-II) onboard Suzaku

T. Kitaguchi; M. Kokubun; M. Kawaharada; M. Murashima; R. Miyawaki; T. Yanagida; T. Itoh; S. Hirakuri; T. Enoto; M. Sato; K. Makishima; T. Takahashi; K. Nakazawa; S. Watanabe; T. Tanaka; Y. Terada; T. Tamagawa; A. Kubota; Y. Fukazawa; M. Mizuno; H. Takahashi; T. Yamasaki; M. Tashiro; Y. Endo; K. Yamaoka; T. Murakami; D. Yonetoku; T. Kamae

doi:10.1117/12.684267

30 August 2006 In-orbit calibration of the hard x-ray detector (HXD-II) onboard Suzaku

T. Kitaguchi, M. Kokubun, M. Kawaharada, M. Murashima, R. Miyawaki, T. Yanagida, T. Itoh, S. Hirakuri, T. Enoto, M. Sato, K. Makishima, T. Takahashi, K. Nakazawa, S. Watanabe, T. Tanaka, Y. Terada, T. Tamagawa, A. Kubota, Y. Fukazawa, M. Mizuno, H. Takahashi, T. Yamasaki, M. Tashiro, Y. Endo, K. Yamaoka, T. Murakami, D. Yonetoku, T. Kamae

Author Affiliations +

Proceedings Volume 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII; 63190U (2006) https://doi.org/10.1117/12.684267
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

The hard X-ray detector (HXD-II) is one of the scientific payloads onboard Suzaku, the 5th Japanese cosmic X-ray satellite. After the launch in July 2005, all the HXD-II components, including the sensors and analog/digital electronics, have been working normally. In order to archive the maximum performance of the HXD-II, especially the GSO/BGO well-type phoswich counters, extensive in-orbit qualification and calibration have been carried out utilizing the data acquired in early operations. Major items of these efforts include; to estimate the circuit dead time, calibrate energy scale, optimize the event selection criteria for background reduction, study the background, and examine the detector response. As a result of these in-orbit calibrations, the HXD-II background in the 10-600 keV range has been successfully lowered to (0.5-5.0) x 10^-4 cs^-1 keV^-1 cm^-2 This the lowest among the background ever achieved in orbit by cosmic hard x-ray detectors.

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T. Kitaguchi, M. Kokubun, M. Kawaharada, M. Murashima, R. Miyawaki, T. Yanagida, T. Itoh, S. Hirakuri, T. Enoto, M. Sato, K. Makishima, T. Takahashi, K. Nakazawa, S. Watanabe, T. Tanaka, Y. Terada, T. Tamagawa, A. Kubota, Y. Fukazawa, M. Mizuno, H. Takahashi, T. Yamasaki, M. Tashiro, Y. Endo, K. Yamaoka, T. Murakami, D. Yonetoku, and T. Kamae "In-orbit calibration of the hard x-ray detector (HXD-II) onboard Suzaku", Proc. SPIE 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII, 63190U (30 August 2006); https://doi.org/10.1117/12.684267

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