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In-flight calibration of Hitomi Soft X-ray Spectrometer. (1) Background

机译:HITMI软X射线光谱仪的飞行校准。 (1)背景

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The X-Ray Spectrometer (XRS) instrument of Suzaku provided the first measurement of the non-X-ray background (NXB) of an X-ray calorimeter spectrometer, but the data set was limited. The Soft X-ray Spectrometer (SXS) instrument of Hitomi was able to provide a more detailed picture of X-ray calorimeter background, with more than 360 ks of data while pointed at the Earth, and a comparable amount of blank-sky data. These data are important not only for analyzing SXS science data, but also for categorizing the contributions to the NXB in X-ray calorimeters as a class. In this paper, we present the contributions to the SXS NXB, the types and effectiveness of the screening, the interaction of the screening with the broad-band redistribution, and the residual background spectrum as a function of magnetic cut-off rigidity. The orbit-averaged SXS NXB in the range 0.3-12 keV was 4 x 10(-2) counts s(-1) cm(-2). This very low background in combination with groundbreaking spectral resolution gave SXS unprecedented sensitivity to weak spectral lines.
机译:Suzaku的X射线光谱仪(XRS)首次提供了X射线热量计光谱仪的非X射线背景(NXB)测量,但数据集有限。Hitomi的软X射线光谱仪(SXS)能够提供X射线热量计背景的更详细图片,指向地球时有超过360 ks的数据,以及相当数量的空白天空数据。这些数据不仅对分析SXS科学数据很重要,而且对将X射线量热计中的NXB贡献分类也很重要。在本文中,我们介绍了SXS NXB的贡献,屏蔽的类型和有效性,屏蔽与宽带再分配的相互作用,以及作为磁截止刚度函数的残余背景光谱。在0.3-12keV范围内,轨道平均SXS NXB为4x10(-2)个计数s(-1)cm(-2)。这种非常低的背景,再加上开创性的光谱分辨率,使SXS对微弱光谱线具有前所未有的灵敏度。

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