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Proceedings Paper

On-orbit calibration status of the hard x-ray detector (HXD) onboard Suzaku
Author(s): S. Nishino; Y. Fukazawa; T. Mizuno; H. Takahashi; K. Hayashi; K. Hiragi; M. Mizuno; S. Yamada; M. Kawaharada; M. Kokubun; K. Nakazawa; S. Watanabe; T. Tanaka; Y. Terada
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Paper Abstract

Hard X-ray Detector (HXD) onboard Suzaku, the Japanese 5th X-ray observatory, consists of 64 PIN photo diodes with 2 mm thickness (10-70 keV) and 16 phoswich detectors using 5 mm-thick GSO scintillators and BGO active collimators (40-600 keV), and these are surrounded by 20 units of BGO Active shields. All the detector units have been working well with no significant troubles in four and a half years since the launch on July 2005, and given many important scientific results. In this paper, we report the recent status of on-orbit calibrations for PIN/GSO detectors. For the PIN, analog/digital threshold levels of both in-orbit and on-ground are raised up to avoid the increasing noise events due to in-orbit radiation damage. For the GSO, the accuracy of the energy scale and modeling of gain variations are improved, and newly calibrated data set including background files and response matrices are released on April 2010.

Paper Details

Date Published: 29 July 2010
PDF: 13 pages
Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 77322J (29 July 2010); doi: 10.1117/12.856888
Show Author Affiliations
S. Nishino, Hiroshima Univ. (Japan)
Y. Fukazawa, Hiroshima Univ. (Japan)
T. Mizuno, Hiroshima Univ. (Japan)
H. Takahashi, Hiroshima Univ. (Japan)
K. Hayashi, Hiroshima Univ. (Japan)
K. Hiragi, Hiroshima Univ. (Japan)
M. Mizuno, Hiroshima Univ. (Japan)
S. Yamada, The Univ. of Tokyo (Japan)
M. Kawaharada, Japan Aerospace Exploration Agency (Japan)
M. Kokubun, Japan Aerospace Exploration Agency (Japan)
K. Nakazawa, The Univ. of Tokyo (Japan)
S. Watanabe, Japan Aerospace Exploration Agency (Japan)
T. Tanaka, Stanford Univ. (United States)
Y. Terada, Saitama Univ. (Japan)

Published in SPIE Proceedings Vol. 7732:
Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray
Monique Arnaud; Stephen S. Murray; Tadayuki Takahashi, Editor(s)

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