In-Orbit Performance of the Gas Imaging Spectrometer onboard ASCA
In-Orbit Performance of the Gas Imaging Spectrometer onboard ASCA
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ASCA 上气体成像光谱仪的在轨性能
DOI：
10.1093/pasj/48.2.171
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发表时间：
1996
影响因子：
2.3
通讯作者：
Noriko Y. Yamasaki
中科院分区：
文献类型：
--
作者：
K. Makishima;M. Tashiro;K. Ebisawa;H. Ezawa;Y. Fukazawa;S. Gunji;M. Hirayama;E. Idesawa;Y. Ikebe;M. Ishida;Y. Ishisaki;N. Iyomoto;T. Kamae;Hidehiro Kaneda;K. Kikuchi;Y. Kohmura;H. Kubo;K. Matsushita;K. Matsuzaki;T. Mihara;K. Nakagawa;T. Ohashi;Y. Saito;Y. Sekimoto;Tadayuki Takahashi;T. Tamura;T. Tsuru;Y. Ueda;Noriko Y. Yamasaki
介绍了位于X射线天文卫星ASCA焦平面上的气体成像光谱仪的在轨性能和校准。广泛的在轨校准已确认其基本性能，包括0.6毫米的位置分辨率（FWHM）和7.8%的能量分辨率（FWHM），都在6千电子伏。当与X射线望远镜结合使用时，GIS的灵敏度范围为0.7-10 keV。已确认GIS的在轨非X射线背景在1-10 keV范围内低至（5-9）× 10 - 4cs-1cm-2keV-1。近3年来，长期探测器增益一直稳定在百分之几以内。对蟹状星云和其他来源的广泛观测提供了GIS的位置响应、测光能力、死时间和定时精度的精确校准。此外，包括时间和位置增益变化以及绝对增益比例的整体能量响应已被校准至± 1%。因此，地理信息系统是一个全面的宇宙X射线探测器，能够进行X射线成像、精细X射线光谱学、通量动态范围超过5个数量级的X射线光度测定和时间分辨率高达60微秒的快速X射线光度测定。
The in-orbit performance and calibration of the Gas Imaging Spectrometer (GIS), located on the focal plane of the X-ray astronomy satellite ASCA, are described. An extensive in-orbit calibration has confirmed its basic performance, including a position resolution of 0.6 mm (FWHM) and an energy resolution of 7.8% (FWHM), both at 6 keV. When combined with the X-ray telescope, the GIS sensitivity range becomes 0.7-10 keV. The in-orbit non X-ray background of the GIS has been confirmed to be as low as (5-9) × 10−4cs−1cm−2keV−1over the 1-10 keV range. The long-term detector gain has been stable within a few % for nearly 3 years. Extensive observations of the Crab Nebula and other sources have provided accurate calibrations of the position response, photometric capability, dead time, and timing accuracy of the GIS. Furthermore, the overall energy response, including the temporal and positional gain variations and the absolute gain scale, has been calibrated to ∼ 1%. Thus, the GIS is working as an all-round cosmic X-ray detector, capable of X-ray imagery, fine X-ray spectroscopy, X-ray photometry with a flux dynamic range covering more than 5 orders of magnitude, and fast X-ray photometry with a time resolution up to 60μs.