X-ray calibration of telescopes on board the ASTRO-E satellite
X-ray calibration of telescopes on board the ASTRO-E satellite
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ASTRO-E 卫星上望远镜的 X 射线校准
DOI：
10.1117/12.331282
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
S. Akao
中科院分区：
文献类型：
--
作者：
R. Shibata;M. Ishida;H. Honda;T. Endo;J. Ishida;H. Kunieda;Y. Tawara;A. Furuzawa;Y. Ogasaka;Manabu Watanabe;K. Misakai;T. Yoshioka;P. Serlemitsos;Y. Soong;Kai;Y. Terashima;S. Akao
我们目前的第一批结果的飞行前校准的X射线望远镜上的ASTRO-E卫星。它们采用薄箔嵌套Wolter Type-I光学器件，原则上与ASCA XRT相同。由于望远镜的放大和反射镜生产的新技术，有效面积和成像能力都得到了提高。在目前的测量中，获得的有效面积分别为460，313和250平方厘米每XRT在1.49，4.51，和8.04 keV，这是显着大于ASCA的1.5和2.5倍，在1.49 keV和8.04 keV。点扩散函数也显示出比ASCA更好的聚焦能力，其因子为2，并且在4.51 keV下获得的半功率直径为1.84弧分。在轴上强度为1计数s-1的X射线星星是杂散光源的情况下，在杂散光图像的最亮部分处获得的杂散光亮度为2 × 10-5计数s-1 mm-2，这与ASCA几乎相同。
We present the first results of pre-flight calibrations of the x-ray telescopes on board ASTRO-E satellite. They adopt a thin foil-nesting Wolter Type-I optics, which is in principle the same as ASCA XRTs. Owing to a scale up of the telescope and a new technique of the reflector production, however, both the effective area and the imaging capability are improved. In the current measurements, the effective area is obtained to be 460, 313 and 250 cm2 per XRT at 1.49, 4.51, and 8.04 keV, respectively, which is significantly larger than that of ASCA by a factor of 1.5 and 2.5 at 1.49 keV and 8.04 keV. The point spread function also shows a better focusing capability than ASCA by a factor of 2, and the half power diameter is obtained to be 1.84 arcmin at 4.51 keV. The brightness of the stray light is obtained to be 2 X 10-5 counts s-1 mm-2 at the brightest part of the stray light image, in the case that the x-ray star with the on-axis intensity of 1 count s-1 is the source of the stray lights, which is almost the same with ASCA.