NAOC Open IR
The background model of the medium energy X-ray telescope of Insight-HXMT
Guo, Cheng-Cheng1,2; Liao, Jin-Yuan1; Zhang, Shu1; Zhang, Juan1; Tan, Ying1; Song, Li-Ming1; Lu, Fang-Jun1; Cao, Xue-Lei1; Chang, Zhi1; Chen, Yu-Peng1; Du, Yuan-Yuan1; Ge, Ming-Yu1; Gu, Yu-Dong1; Jiang, Wei-Chun1; Jin, Jing1; Li, Gang1; Li, Xian1; Li, Xiao-Bo1; Liu, Shao-Zhen1; Liu, Xiao-Jing1; Lu, Xue-Feng1; Luo, Tao1; Meng, Bin1; Sun, Liang1; Yang, Jia-Wei1; Yang, Sheng1; You, Yuan1,2; Zhang, Wan-Chang1; Zhao, Hai-Sheng1; Zhang, Shuang-Nan1,2,3
2020-08-01
Source PublicationJOURNAL OF HIGH ENERGY ASTROPHYSICS
ISSN2214-4048
Volume27Pages:44-50
AbstractThe Medium Energy X-ray Telescope (ME) is one of the main payloads of the Hard X-ray Modulation Telescope(dubbed as Insight-HXMT). The background of Insight-HXMT/ME is mainly caused by the environmental charged particles and the background intensity is modulated remarkably by the geomagnetic field, as well as the geographical location. At the same geographical location, the background spectral shape is stable but the intensity varies with the level of the environmental charged particles. In this paper, we develop a model to estimate the ME background based on the ME database that is established with the two-year blank sky observations of the high Galactic latitude. In this model, the entire geographical area covered by Insight-HXMTis divided into grids of 5 degrees x 5 degrees in geographical coordinate system. For each grid, the background spectral shape can be obtained from the background database and the intensity can be corrected by the contemporary count rate of the blind FOV detectors. Thus the background spectrum can be obtained by accumulating the background of all the grids passed by Insight-HXMT during the effective observational time. The model test with the blank sky observations shows that the systematic error of the background estimation in 8.9 - 44.0keV is similar to 1.3% for a pointing observation with an average exposure similar to 5.5ks. We also find that the systematic error is anti-correlated with the exposure, which indicates the systematic error is partly contributed by the statistical error of count rate measured by the blind FOV detectors. (C) 2020 Elsevier B.V. All rights reserved.
KeywordInstrumentation: detectors 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.2020.02.008
WOS KeywordREPRODUCIBILITY
Language英语
Funding ProjectChina National Space Administration (CNSA) ; Chinese Academy of Sciences (CAS) ; National Program on Key Research and Development Project[2016YFA0400801] ; National Program on Key Research and Development Project[2016YFA0400802] ; 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:000569885200006
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81297
Collection中国科学院国家天文台
Corresponding AuthorGuo, Cheng-Cheng; Liao, Jin-Yuan
Affiliation1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Guo, Cheng-Cheng,Liao, Jin-Yuan,Zhang, Shu,et al. The background model of the medium energy X-ray telescope of Insight-HXMT[J]. JOURNAL OF HIGH ENERGY ASTROPHYSICS,2020,27:44-50.
APA Guo, Cheng-Cheng.,Liao, Jin-Yuan.,Zhang, Shu.,Zhang, Juan.,Tan, Ying.,...&Zhang, Shuang-Nan.(2020).The background model of the medium energy X-ray telescope of Insight-HXMT.JOURNAL OF HIGH ENERGY ASTROPHYSICS,27,44-50.
MLA Guo, Cheng-Cheng,et al."The background model of the medium energy X-ray telescope of Insight-HXMT".JOURNAL OF HIGH ENERGY ASTROPHYSICS 27(2020):44-50.
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