The First Insight-HXMT Gamma-Ray Burst Catalog: The First Four Years
Li, Gang; Ge, Ming-Yu; Ma, Xiang; Zhang, Shuang-Nan; Li, Xiao-Bo; Zhang, Juan; Frontera, Filippo; Jia, Shu-Mei; Li, Cheng-Kui; Song, Li-Ming; Guidorzi, Cristiano; Liao, Jin-Yuan; Huang, Yue; Song, Xin-Ying; Xiong, Shao-Lin; Liu, Cong-Zhan; Li, Xu-Fang; Cai, Ce; Luo, Qi; Xiao, Shuo; Yi, Qi-Bin; Zheng, Yao-Guang; Zhou, Deng-Ke; Liu, Jia-Cong; Xue, Wang-Chen; Zhang, Yan-Qiu; Zheng, Chao; Chang, Zhi; Li, Zheng-Wei; Lu, Xue-Feng; Zhang, Ai-Mei; Zhang, Yi-Fei; Jin, Yong-Jie; Li, Ti-Pei; Lu, Fang-Jun; Wu, Mei; Xu, Yu-Peng; Li, Bing; Nie, Jian-Yin; Wang, Ling-Jun; Zheng, Shi-Jie; Yang, Xue-Juan; Yang, Rong-Jia
China, Italy
Abstract
The Hard X-ray Modulation Telescope (Insight-HXMT) is China's first X-ray astronomy satellite. It was launched on 2017 June 15. The anticoincidence CsI detectors of the High Energy X-ray telescope (HE) on board Insight-HXMT could serve as an all-sky gamma-ray monitor in about 0.2-3 MeV. In its first four years of operation, Insight-HXMT has detected 322 gamma-ray bursts (GRBs) by the offline search pipeline, including blind search and targeted search. For the GOLDEN sample of Insight-HXMT GRBs, joint analyses were performed with other GRB missions, including the Fermi Gamma-ray Burst Monitor (Fermi/GBM), the Swift Burst Alert Telescope (Swift/BAT), and the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM). The analyses showed that Insight-HXMT can provide a better constraint on the GRB spectrum at a higher-energy band. The properties of Insight-HXMT GRBs are reported in detail, including their trigger time, duration, spectral parameters, peak fluxes of different timescales, and fluence. This catalog is an official product of the Insight-HXMT GRB team.