NAOC Open IR
Background model for the high-energy telescope of Insight-HXMT
Liao, Jin-Yuan1; Zhang, Shu1; Lu, Xue-Feng1; Zhang, Juan1; Li, Gang1; Chang, Zhi1; Chen, Yu-Peng1; Ge, Ming-Yu1; Guo, Cheng-Cheng1,2; Huang, Rui3; Jin, Jing1; Li, Xiao-Bo1; Li, Xu-Fang1; Li, Zheng-Wei1; Liu, Cong-Zhan1; Lu, Fang-Jun1; Nie, Jian-Yin1; Song, Li-Ming1; Wang, Si-Fan3; You, Yuan1,2; Zhang, Yi-Fei1; Zhao, Hai-Sheng1; Zhang, Shuang-Nan1,2,4
2020-08-01
Source PublicationJOURNAL OF HIGH ENERGY ASTROPHYSICS
ISSN2214-4048
Volume27Pages:14-23
AbstractAccurate background estimation is essential for spectral and temporal analysis in astrophysics. In this work, we construct the in-orbit background model for the High-Energy Telescope (HE) of the Hard Xray Modulation Telescope(dubbed as Insight-HXMT). Based on the two-year blank sky observations of Insight-HXMT/HE, we first investigate the basic properties of the background and find that both the background spectral shape and intensity have long-term evolution at different geographical sites. The entire earth globe is then divided into small grids, each with a typical area of 5 x5square degrees in geographical coordinate system. For each grid, an empirical function is used to describe the long-term evolution of each channel of the background spectrum; the intensity of the background can be variable and a modification factor is introduced to account for this variability by measuring the contemporary flux of the blind detector. For a given pointing observation, the background model is accomplished by integrating over the grids that are passed by the track of the satellite in each orbit. Such a background model is tested with both the blank sky observations and campaigns for observations of a series of celestial sources. The results show an average systematic error of 1.5% for the background energy spectrum (26-100keV) under a typical exposure of 8ks, and < 3% for background light curve estimation (30-150keV). Therefore, the background model introduced in this paper is included in the Insight-HXMT software as a standard part specialized for both spectral and temporal analyses. (C) 2020 Elsevier B.V. All rights reserved.
KeywordInstrumentation: detectors Space vehicles: instruments Methods: data analysis X-rays: general
Funding OrganizationChina National Space Administration (CNSA) ; China National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI10.1016/j.jheap.2020.04.002
WOS KeywordIN-FLIGHT PERFORMANCE ; X-RAY BINARIES ; INSTRUMENT ; DESIGN ; CAMERA ; BOARD
Language英语
Funding ProjectChina National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project[2016YFA0400800] ; National Natural Science Foundation of China[U1838202] ; National Natural Science Foundation of China[U1838201]
Funding OrganizationChina National Space Administration (CNSA) ; China National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000569885200002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81336
Collection中国科学院国家天文台
Corresponding AuthorLiao, Jin-Yuan
Affiliation1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Liao, Jin-Yuan,Zhang, Shu,Lu, Xue-Feng,et al. Background model for the high-energy telescope of Insight-HXMT[J]. JOURNAL OF HIGH ENERGY ASTROPHYSICS,2020,27:14-23.
APA Liao, Jin-Yuan.,Zhang, Shu.,Lu, Xue-Feng.,Zhang, Juan.,Li, Gang.,...&Zhang, Shuang-Nan.(2020).Background model for the high-energy telescope of Insight-HXMT.JOURNAL OF HIGH ENERGY ASTROPHYSICS,27,14-23.
MLA Liao, Jin-Yuan,et al."Background model for the high-energy telescope of Insight-HXMT".JOURNAL OF HIGH ENERGY ASTROPHYSICS 27(2020):14-23.
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