The X-ray telescope onboard Suzaku
The X-ray telescope onboard Suzaku
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DOI：
10.1093/pasj/59.sp1.s9
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发表时间：
2007-01-30
影响因子：
2.3
通讯作者：
Misaki, Kazutami
中科院分区：
文献类型：
--
作者：
Serlemitsos, Peter J.;Soong, Yang;Misaki, Kazutami
介绍了铃鹿号上的X射线望远镜(XRT)的设计参数、生产工艺和飞行性能。与ASCA XRT相比，成像能力有了显著提高，ASCA XRT的半功率直径为36，所有四个XRT-I模块的成像能力都达到了1‘8-2’3。光轴分布在半径为1：3的范围内，这使得所有XRT在XIS默认观测位置的观测效率超过97%。通过光线跟踪预测的XIS视场上的晕晕与观测蟹状星云时测得的晕晕重合，接近10%。对在两个标准观测位置(XIS/HXD-默认位置)拍摄的蟹状星云的所有XIS光谱同时进行幂定律拟合，得到的通量与Toor和Seward(1974，AJ，79,995)获得的通量一致，范围类似于2%。每个XRT模块顶部的预准直器成功地将20‘和50’偏离方向的杂散光强度降低到飞行前的预期水平。
We present the design parameters, production process, and in-flight performance of the X-ray telescope (XRT) onboard Suzaku. The imaging capability is significantly improved over the ASCA XRT, which had half-power diameters of 36, to 1'8-2'3 for all four XRT-I modules. The optical axes are found to be distributed within a radius of 1'3, which makes the observation efficiency of all the XRTs more than 97% at the XIS-default observing position. The vignetting over the XIS field of view predicted via ray-tracing coincides with that measured for observations of the Crab Nebula to within similar to 10%. Contemporaneous fits of a power law to all of the XIS spectra of the Crab Nebula taken at the two standard observing positions (XIS/HXD-default positions) gives a flux consistent with that obtained by Toor and Seward (1974, AJ, 79, 995) to within similar to 2%. The pre-collimator on the top of each XRT module successfully reduces the intensity of the stray light from the 20' and 50'-off directions down to the level of pre-flight expectations.