Search for Gamma-Ray Bursts and Gravitational Wave Electromagnetic Counterparts with High Energy X-ray Telescope of \textit{Insight}-HXMT
| Autor: | Yu-Dong Gu, C. K. Li, C. Cai, J. Y. Zhang, Wenxiong Li, Y. Nang, Z. Chang, Yuan-Yuan Du, Z. W. Li, B. Y. Wu, B. B. Wu, Wenhan Jiang, J. Y. Nie, Jia Huo, B. S. Liu, L. D. Kong, F. J. Lu, Y. B. Chen, X. Q. Ren, Yuyang Zhao, Fuqin Zhang, S. N. Zhang, X. X. Li, XiangYang Wen, Lian Tao, Peng Zhang, Gang Li, S. J. Zheng, Bo Li, D. K. Zhou, X. Y. Song, Y. G. Zheng, Y. S. Wang, Tian-Xiang Chen, X. J. Liu, Wei Zhang, Cunguo Wang, Cheng-Cheng Guo, Libin Wang, Yuan You, Qi-Bin Yi, W. C. Zhang, G. H. Gao, Lei Sun, Ya Fang Huang, Y. H. Tan, Wei Cui, M. Wu, Wei Chen, L. Chen, Yi-Yan Yang, Y. H. Zhang, Ming-Yu Ge, H. W. Liu, N. Sai, J. Y. Liao, X. H. Liang, H. M. Zhang, R. C. Ma, Y. P. Xu, Y. F. Zhang, X. B. Li, Xuelong Li, J. Guan, Qingcui Bu, X J Yang, L. M. Song, Tao Luo, S. Xiao, Da-Wei Han, J. L. Qu, Hongfei Liu, X. L. Cao, Q. Q. Yin, Y. P. Chen, J. Jin, Yu-Xuan Zhu, Xin-Fu Zhao, C. Z. Liu, Sisi Yang, R. J. Yang, Qiu-Yi Luo, Y. L. Tuo, Bin Meng, Z. Zhang, Shaolin Xiong, H. Gao, Y. J. Yang, G. C. Xiao, H. S. Zhao, P. J. Wang, W. S. Wang, Ge Ou, X. H. Ma, Xue-Feng Lu, Shuinai Zhang, Tong Li, S. M. Jia |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
High Energy Astrophysical Phenomena (astro-ph.HE) Gravitational wave Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astronomy and Astrophysics X-ray telescope Astrophysics Light curve Coincidence law.invention Telescope Space and Planetary Science law Sensitivity (control systems) Gamma-ray burst Astrophysics - High Energy Astrophysical Phenomena Fermi Gamma-ray Space Telescope |
| Popis: | The High Energy X-ray telescope (HE) on-board the Hard X-ray Modulation Telescope (\textit{Insight}-HXMT) can serve as a wide Field of View (FOV) gamma-ray monitor with high time resolution ($\mu$s) and large effective area (up to thousands cm$^2$). We developed a pipeline to search for Gamma-Ray Bursts (GRBs), using the traditional signal-to-noise ratio (SNR) method for blind search and the coherent search method for targeted search. By taking into account the location and spectrum of the burst and the detector response, the targeted coherent search is more powerful to unveil weak and sub-threshold bursts, especially those in temporal coincidence with Gravitational Wave (GW) events. Based on the original method in literature, we further improved the coherent search to filter out false triggers caused by spikes in light curves, which are commonly seen in gamma-ray instruments (e.g. \textit{Fermi}/GBM, \textit{POLAR}). We show that our improved targeted coherent search method could eliminate almost all false triggers caused by spikes. Based on the first two years of \textit{Insight}-HXMT/HE data, our targeted search recovered 40 GRBs, which were detected by either \textit{Swift}/BAT or \textit{Fermi}/GBM but too weak to be found in our blind search. With this coherent search pipeline, the GRB detection sensitivity of \textit{Insight}-HXMT/HE is increased to about 1.5E-08 erg/cm$^2$ (200 keV$-$3 MeV). We also used this targeted coherent method to search \textit{Insight}-HXMT/HE data for electromagnetic (EM) counterparts of LIGO-Virgo GW events (including O2 and O3a runs). However, we did not find any significant burst associated with GW events. Comment: 12 pages, 14 figures, 5 tables; accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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