Chenwei Wang, Juan Zhang, Shijie Zheng, Shaolin Xiong, Zhenghua An, Wenxi Peng, Haisheng Zhao, Xiaoyun Zhao, Chao Zheng, Peiyi Feng, Ke Gong, Dongya Guo, Xinqiao Li, Jiacong Liu, Yaqing Liu, Wenjun Tan, Yue Wang, Wangchen Xue, Sheng Yang, Dali Zhang, Fan Zhang, Yanqiu Zhang
{"title":"模拟飞行背景和 DRO/GTM 性能","authors":"Chenwei Wang, Juan Zhang, Shijie Zheng, Shaolin Xiong, Zhenghua An, Wenxi Peng, Haisheng Zhao, Xiaoyun Zhao, Chao Zheng, Peiyi Feng, Ke Gong, Dongya Guo, Xinqiao Li, Jiacong Liu, Yaqing Liu, Wenjun Tan, Yue Wang, Wangchen Xue, Sheng Yang, Dali Zhang, Fan Zhang, Yanqiu Zhang","doi":"10.1007/s10686-024-09946-8","DOIUrl":null,"url":null,"abstract":"<div><p>As a new member of the high energy astronomical transient monitoring network, Gamma-ray Transient Monitor (GTM) is an all-sky monitor onboard the Distant Retrograde Orbit (DRO) mission which has been launched in March 2024. In this work, we investigate the space radiation environment of DRO, and study the in-flight background of GTM using GEANT4. The background count rate on each of the 5 GTP detectors of GTM is estimated to be about 800<span>\\(\\sim \\)</span>1000 counts/s in the energy range from 20 keV to 1 MeV after one-year operation on orbit. We find that there are two distinct spectral lines clearly visible in the background spectrum, i.e. the 59 keV emission line from the embedded calibration source <span>\\(^{241}\\)</span>Am and the 511 keV emission line induced by space radiations, which are suitable for the in-flight energy gain calibration. These results provide important reference for the development of payload, design of observation strategies, in-flight calibration of instrument and research of scientific objectives.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"57 3","pages":""},"PeriodicalIF":2.7000,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Simulation of the in-flight background and performance of DRO/GTM\",\"authors\":\"Chenwei Wang, Juan Zhang, Shijie Zheng, Shaolin Xiong, Zhenghua An, Wenxi Peng, Haisheng Zhao, Xiaoyun Zhao, Chao Zheng, Peiyi Feng, Ke Gong, Dongya Guo, Xinqiao Li, Jiacong Liu, Yaqing Liu, Wenjun Tan, Yue Wang, Wangchen Xue, Sheng Yang, Dali Zhang, Fan Zhang, Yanqiu Zhang\",\"doi\":\"10.1007/s10686-024-09946-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>As a new member of the high energy astronomical transient monitoring network, Gamma-ray Transient Monitor (GTM) is an all-sky monitor onboard the Distant Retrograde Orbit (DRO) mission which has been launched in March 2024. In this work, we investigate the space radiation environment of DRO, and study the in-flight background of GTM using GEANT4. The background count rate on each of the 5 GTP detectors of GTM is estimated to be about 800<span>\\\\(\\\\sim \\\\)</span>1000 counts/s in the energy range from 20 keV to 1 MeV after one-year operation on orbit. We find that there are two distinct spectral lines clearly visible in the background spectrum, i.e. the 59 keV emission line from the embedded calibration source <span>\\\\(^{241}\\\\)</span>Am and the 511 keV emission line induced by space radiations, which are suitable for the in-flight energy gain calibration. These results provide important reference for the development of payload, design of observation strategies, in-flight calibration of instrument and research of scientific objectives.</p></div>\",\"PeriodicalId\":551,\"journal\":{\"name\":\"Experimental Astronomy\",\"volume\":\"57 3\",\"pages\":\"\"},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-06-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Experimental Astronomy\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10686-024-09946-8\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ASTRONOMY & ASTROPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Experimental Astronomy","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s10686-024-09946-8","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
Simulation of the in-flight background and performance of DRO/GTM
As a new member of the high energy astronomical transient monitoring network, Gamma-ray Transient Monitor (GTM) is an all-sky monitor onboard the Distant Retrograde Orbit (DRO) mission which has been launched in March 2024. In this work, we investigate the space radiation environment of DRO, and study the in-flight background of GTM using GEANT4. The background count rate on each of the 5 GTP detectors of GTM is estimated to be about 800\(\sim \)1000 counts/s in the energy range from 20 keV to 1 MeV after one-year operation on orbit. We find that there are two distinct spectral lines clearly visible in the background spectrum, i.e. the 59 keV emission line from the embedded calibration source \(^{241}\)Am and the 511 keV emission line induced by space radiations, which are suitable for the in-flight energy gain calibration. These results provide important reference for the development of payload, design of observation strategies, in-flight calibration of instrument and research of scientific objectives.
期刊介绍：
Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments.
Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields.
Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.
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