The First Insight-HXMT Gamma-Ray Burst Catalog: The First Four Years
X. Y. Song, S. L. Xiong, Shuang‐Nan Zhang, Cheng-Kui Li, Xiao‐Bo Li, Y. Huang, C. Guidorzi, F. Frontera, Congzhan Liu, Xufang Li, Gang Li, J. Y. Liao, Ce Cai, Q. Luo, Shuo Xiao, Qi-Bin Yi, Y. G. Zheng, D. K. Zhou, Jia-Cong Liu, W. C. Xue, Yan-Qiu Zhang, Chao Zheng, Zhi Chang, Zhengwei Li, X. F. Lu, Aimei Zhang, Yifei Zhang, Yongjie Jin, Ti-Pei Li, F. J. Lu, L. M. Song, Mei‐Hwan Wu, Y. P. Xu, Xiang Ma, M. Y. Ge, S. M. Jia, Bing Li, Jian-Yin Nie, Ling‐Jun Wang, Juan Zhang, S. J. Zheng, Xuejuan Yang, Rong-Jia Yang
Abstract
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.