Performance of ASTRO-H hard x-ray telescope (HXT)
Performance of ASTRO-H hard x-ray telescope (HXT)
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ASTRO-H硬X射线望远镜（HXT）的性能
DOI：
10.1117/12.2231258
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
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作者：
Awaki;H.;Kunieda;H.;Ishida;M.;Matsumoto;H.;et al.
日本X射线天文卫星Hitomi（ASTRO-H）携带硬X射线成像系统，覆盖5 keV至80 keV的能带。硬X射线成像系统由两台硬X射线望远镜（HXT）和焦平面探测器（HXI）组成。HXT采用紧密嵌套的圆锥近似薄箔Wolter-I光学器件。HXT的镜面镀上Pt/C深度梯度多层膜。我们在日本同步辐射装置SPring-8/BL 20 B2上进行了HXT的地面标定，发现在30 keV下，两个HXT的总有效面积约为350 cm 2，HXT的半功率直径约为1. 9.在Hitomi发射后，Hitomi在对机载仪器进行初步功能验证时观察到了几个目标。Hitomi软件和校准团队（SCT）向硬件团队提供了Hitomi的G21.5-0.9脉冲星风星云数据，用于仪器校准。通过对飞行数据的分析，我们证实了HXTs的在轨X射线性能与地面标定结果是一致的。
The Japanese X-ray Astronomy Satellite, Hitomi (ASTRO-H) carries hard X-ray imaging system, covering the energy band from 5 keV to 80 keV. The hard X-ray imaging system consists of two hard X-ray telescopes (HXT) and the focal plane detectors (HXI). The HXT employs tightly-nested, conically-approximated thin foil Wolter-I optics. The mirror surfaces of HXT were coated with Pt/C depth-graded multilayers. We carried out ground calibrations of HXTs at the synchrotron radiation facility SPring-8/ BL20B2 Japan, and found that total effective area of two HXTs was about 350 cm2at 30 keV, and the half power diameter of HXT was about 1.’9. After the launch of Hitomi, Hitomi observed several targets during the initial functional verification of the onboard instruments. The Hitomi software and calibration team (SCT) provided the Hitomi’s data of G21.5-0.9, a pulsar wind nebula, to the hardware team for the purpose of the instrument calibration. Through the analysis of the in-flight data, we have confirmed that the X-ray performance of HXTs in orbit was consistent with that obtained by the ground calibrations.