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- Title
In-flight calibration of Hitomi Soft X-ray Spectrometer. (1) Background.
- Authors
KILBOURNE, Caroline A.; Makoto SAWADA; Masahiro TSUJIMOTO; Lorella ANGELLINI; BOYCE, Kevin R.; ECKART, Megan E.; Ryuichi FUJIMOTO; Yoshitaka ISHISAKI; KELLEY, Richard L.; Shu KOYAMA; LEUTENEGGER, Maurice A.; Michael LOEWENSTEIN; Dan MCCAMMON; Kazuhisa MITSUDA; Shinya NAKASHIMA; PORTER, Frederick S.; Hiromi SETA; Yoh TAKEI; TASHIRO, Makoto S.; Yukikatsu TERADA
- Abstract
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 × 10-2 counts s-2 cm-2. This very low background in combination with groundbreaking spectral resolution gave SXS unprecedented sensitivity to weak spectral lines.
- Subjects
X-ray spectrometers; BACKGROUND radiation; CALORIMETERS; SPECTRAL lines; SPACE vehicles
- Publication
Publications of the Astronomical Society of Japan, 2018, Vol 70, Issue 2, p1
- ISSN
0004-6264
- Publication type
Article
- DOI
10.1093/pasj/psx139