The GECAM Ground Search System for Gamma-ray Transients
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915183011561472 |
|---|---|
| author | Cai, Ce Zhang, Yan-Qiu Xiong, Shao-Lin Wang, Ping Li, Jian-Hui Li, Xiao-Bo Li, Cheng-Kui Huang, Yue Zheng, Shi-Jie Song, Li-Ming Xiao, Shuo Yi, Qi-Bin Zhao, Yi Xie, Sheng-Lun Qiao, Rui Du, Yan-Qi Guo, Zhi-Wei Xue, Wang-Chen Zheng, Chao Liu, Jia-Cong Wang, Chen-Wei Tan, Wen-Jun Wang, Yue Zhang, Jin-Peng Li, Chao-Yang Zhao, Guo-Ying Zhao, Xiao-Yun Zhang, Xiao-Lu Zhang, Zhen Peng, Wen-Xi Ma, Xiang Shi, Jing-Yan Guo, Dong-Ya Wang, Jin Li, Xin-Qiao Wen, Xiang-Yang An, Zheng-Hua Zhang, Fan |
| author_facet | Cai, Ce Zhang, Yan-Qiu Xiong, Shao-Lin Wang, Ping Li, Jian-Hui Li, Xiao-Bo Li, Cheng-Kui Huang, Yue Zheng, Shi-Jie Song, Li-Ming Xiao, Shuo Yi, Qi-Bin Zhao, Yi Xie, Sheng-Lun Qiao, Rui Du, Yan-Qi Guo, Zhi-Wei Xue, Wang-Chen Zheng, Chao Liu, Jia-Cong Wang, Chen-Wei Tan, Wen-Jun Wang, Yue Zhang, Jin-Peng Li, Chao-Yang Zhao, Guo-Ying Zhao, Xiao-Yun Zhang, Xiao-Lu Zhang, Zhen Peng, Wen-Xi Ma, Xiang Shi, Jing-Yan Guo, Dong-Ya Wang, Jin Li, Xin-Qiao Wen, Xiang-Yang An, Zheng-Hua Zhang, Fan |
| contents | In the era of time-domain, multi-messenger astronomy, the detection of transient events on the high-energy electromagnetic sky has become more important than ever. The Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a dedicated mission to monitor gamma-ray transients, launched in December, 2020. A real-time on-board trigger and location software, using the traditional signal-to-noise ratio (SNR) method for blind search, is constrained to relatively bright signals due to the limitations in on-board computing resources and the need for real-time search. In this work, we developed a ground-based pipeline for GECAM to search for various transients, especially for weak bursts missed by on-board software. This pipeline includes both automatic and manual mode, offering options for blind search and targeted search. The targeted search is specifically designed to search for interesting weak bursts, such as gravitational wave-associated gamma-ray bursts (GRBs). From the ground search of the data in the first year, GECAM has been triggered by 54 GRBs and other transients, including soft gamma-ray repeaters, X-ray binaries, solar flares, terrestrial gamma-ray flashes. We report the properties of each type of triggers,such as trigger time and light curves. With this search pipeline and assuming a soft Band spectrum, the GRB detection sensitivity of GECAM is increased to about 1.1E-08 erg cm-2 s-1 (10 keV - 1000 keV, burst duration of 20 s). These results demonstrate that the GECAM ground search system (both blind search and targeted search) is a versatile pipeline to recover true astrophysical signals which were too weak to be found in the on-board search. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_03161 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The GECAM Ground Search System for Gamma-ray Transients Cai, Ce Zhang, Yan-Qiu Xiong, Shao-Lin Wang, Ping Li, Jian-Hui Li, Xiao-Bo Li, Cheng-Kui Huang, Yue Zheng, Shi-Jie Song, Li-Ming Xiao, Shuo Yi, Qi-Bin Zhao, Yi Xie, Sheng-Lun Qiao, Rui Du, Yan-Qi Guo, Zhi-Wei Xue, Wang-Chen Zheng, Chao Liu, Jia-Cong Wang, Chen-Wei Tan, Wen-Jun Wang, Yue Zhang, Jin-Peng Li, Chao-Yang Zhao, Guo-Ying Zhao, Xiao-Yun Zhang, Xiao-Lu Zhang, Zhen Peng, Wen-Xi Ma, Xiang Shi, Jing-Yan Guo, Dong-Ya Wang, Jin Li, Xin-Qiao Wen, Xiang-Yang An, Zheng-Hua Zhang, Fan High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics In the era of time-domain, multi-messenger astronomy, the detection of transient events on the high-energy electromagnetic sky has become more important than ever. The Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a dedicated mission to monitor gamma-ray transients, launched in December, 2020. A real-time on-board trigger and location software, using the traditional signal-to-noise ratio (SNR) method for blind search, is constrained to relatively bright signals due to the limitations in on-board computing resources and the need for real-time search. In this work, we developed a ground-based pipeline for GECAM to search for various transients, especially for weak bursts missed by on-board software. This pipeline includes both automatic and manual mode, offering options for blind search and targeted search. The targeted search is specifically designed to search for interesting weak bursts, such as gravitational wave-associated gamma-ray bursts (GRBs). From the ground search of the data in the first year, GECAM has been triggered by 54 GRBs and other transients, including soft gamma-ray repeaters, X-ray binaries, solar flares, terrestrial gamma-ray flashes. We report the properties of each type of triggers,such as trigger time and light curves. With this search pipeline and assuming a soft Band spectrum, the GRB detection sensitivity of GECAM is increased to about 1.1E-08 erg cm-2 s-1 (10 keV - 1000 keV, burst duration of 20 s). These results demonstrate that the GECAM ground search system (both blind search and targeted search) is a versatile pipeline to recover true astrophysical signals which were too weak to be found in the on-board search. |
| title | The GECAM Ground Search System for Gamma-ray Transients |
| topic | High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2503.03161 |