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  4. 硬X射线调制望远镜卫星
Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT

文献类型：期刊论文

作者HXMT
刊名Astrophysics and Space Science
出版日期2020
卷号365页码:158
ISSN号0004-640X
关键词Insight-HXMT Geant4 simulation Background observation Astrophysics - Instrumentation and Methods for Astrophysics Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.
DOI10.1007/s10509-020-03873-8
文献子类Journal Article
语种英语
源URL[http://ir.ihep.ac.cn/handle/311005/291335]  
专题硬X射线调制望远镜卫星
推荐引用方式
GB/T 7714		 HXMT. Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT[J]. Astrophysics and Space Science,2020,365:158.
APA HXMT.(2020).Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT.Astrophysics and Space Science,365,158.
MLA HXMT."Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT".Astrophysics and Space Science 365(2020):158.

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来源：高能物理研究所

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