The Gamma-Ray Monitor onboard the SVOM satellite
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866910168281776128 |
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| author | Sun, Jian-Chao Dong, Yong-Wei He, Jiang Liu, Jiang-Tao Li, Lu Wang, Rui-Jie Liu, Xin Zhang, Li Gao, Min Huang, Yue Shi, Hao-Li Song, Li-Ming Tan, Wen-Jun Wang, Chen-Wei Wang, Jin Wang, Jin-Zhou Wang, Ping Wen, Xing Wu, Bo-Bing Xiong, Shao-Lin Zhang, Juan Zhang, Shuang-Nan Zhao, Xiao-Yun Zheng, Shi-Jie |
| author_facet | Sun, Jian-Chao Dong, Yong-Wei He, Jiang Liu, Jiang-Tao Li, Lu Wang, Rui-Jie Liu, Xin Zhang, Li Gao, Min Huang, Yue Shi, Hao-Li Song, Li-Ming Tan, Wen-Jun Wang, Chen-Wei Wang, Jin Wang, Jin-Zhou Wang, Ping Wen, Xing Wu, Bo-Bing Xiong, Shao-Lin Zhang, Juan Zhang, Shuang-Nan Zhao, Xiao-Yun Zheng, Shi-Jie |
| contents | The Gamma-Ray Monitor (GRM) is a key scientific payload onboard the Space-based Multi-band Variable Object Monitor (SVOM) satellite, designed specifically for the detection and study of gamma-ray bursts (GRBs). Launched into a 625 km low-Earth orbit on 22 June 2024, GRM serves as a large-area, wide-field-of-view instrument capable of observing the hard X-ray and soft gamma-ray emissions in the energy range of 15 keV to 5 MeV. Its primary scientific objectives include: promptly triggering and localizing GRBs (with particular sensitivity to short-hard GRBs), measuring spectral and temporal properties of bursts, monitoring charged particle fluxes in orbit. GRM successfully detected its first GRB (GRB 240627B) on 27 June 2024, and has since maintained a detection rate of more than 100 GRBs per year. Cross-instrument comparisons with detectors such as GECAM and Fermi/GBM have validated the performance and data quality of GRM. This paper provides a comprehensive overview of GRM instrument design, reliability verification through ground testing, in-orbit triggering and localization algorithms, performance calibration, and preliminary in-orbit results, demonstrating its capability as a versatile gamma-ray all-sky monitor. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_18985 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The Gamma-Ray Monitor onboard the SVOM satellite Sun, Jian-Chao Dong, Yong-Wei He, Jiang Liu, Jiang-Tao Li, Lu Wang, Rui-Jie Liu, Xin Zhang, Li Gao, Min Huang, Yue Shi, Hao-Li Song, Li-Ming Tan, Wen-Jun Wang, Chen-Wei Wang, Jin Wang, Jin-Zhou Wang, Ping Wen, Xing Wu, Bo-Bing Xiong, Shao-Lin Zhang, Juan Zhang, Shuang-Nan Zhao, Xiao-Yun Zheng, Shi-Jie Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena The Gamma-Ray Monitor (GRM) is a key scientific payload onboard the Space-based Multi-band Variable Object Monitor (SVOM) satellite, designed specifically for the detection and study of gamma-ray bursts (GRBs). Launched into a 625 km low-Earth orbit on 22 June 2024, GRM serves as a large-area, wide-field-of-view instrument capable of observing the hard X-ray and soft gamma-ray emissions in the energy range of 15 keV to 5 MeV. Its primary scientific objectives include: promptly triggering and localizing GRBs (with particular sensitivity to short-hard GRBs), measuring spectral and temporal properties of bursts, monitoring charged particle fluxes in orbit. GRM successfully detected its first GRB (GRB 240627B) on 27 June 2024, and has since maintained a detection rate of more than 100 GRBs per year. Cross-instrument comparisons with detectors such as GECAM and Fermi/GBM have validated the performance and data quality of GRM. This paper provides a comprehensive overview of GRM instrument design, reliability verification through ground testing, in-orbit triggering and localization algorithms, performance calibration, and preliminary in-orbit results, demonstrating its capability as a versatile gamma-ray all-sky monitor. |
| title | The Gamma-Ray Monitor onboard the SVOM satellite |
| topic | Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2604.18985 |