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Search for gamma-ray bursts and gravitational wave electromagnetic counterparts with High Energy X-ray Telescope of Insight-HXMT
Cai, C.; Xiong, S. L.; Li, C. K.; Liu, C. Z.; Zhang, S. N.; Li, X. B.; Song, L. M.; Li, B.; Xiao, S.; Yi, Q. B.; Zhu, Y.; Zheng, Y. G.; Chen, W.; Luo, Q.; Huang, Y.; Song, X. Y.; Zhao, H. S.; Zhao, Y.; Zhang, Z.; Bu, Q. C.; Cao, X. L.; Chang, Z.; Chen, L.; Chen, T. X.; Chen, Y. B.; Chen, Y.; Chen, Y. P.; Cui, W. W.; Du, Y. Y.; Gao, G. H.; Gao, H.; Ge, M. Y.; Gu, Y. D.; Guan, J.; Guo, C. C.; Han, D. W.; Huo, J.; Jia, S. M.; Jiang, W. C.; Jin, J.; Kong, L. D.; Li, G.; Li, T. P.; Li, W.; Li, X.; Li, X. F.; Li, Z. W.; Liang, X. H.; Liao, J. Y.; Liu, B. S.; Liu, H. W.; Liu, H. X.; Liu, X. J.; Lu, F. J.; Lu, X. F.; Luo, T.; Ma, R. C.; Ma, X.; Meng, B.; Nang, Y.; Nie, J. Y.; Ou, G.; Qu, J. L.; Ren, X. Q.; Sai, N.; Sun, L.; Tan, Y.; Tao, L.; Tuo, Y. L.; Wang, C.; Wang, L. J.; Wang, P. J.; Wang, W. S.; Wang, Y. S.; Wen, X. Y.; Wu, B. B.; Wu, B. Y.; Wu, M.; Xiao, G. C.; Xu, Y. P.; Yang, R. J.; Yang, S.; Yang, Y. J.; Yang, Y. R.; Yang, X. J.; Yin, Q. Q.; You, Y.; Zhang, F.; Zhang, H. M.; Zhang, J.; Zhang, P.; Zhang, S.; Zhang, W. C.; Zhang, W.; Zhang, Y. F.; Zhang, Y. H.; Zhao, X. F.; Zheng, S. J.; Zhou, D. K.
2021
Source PublicationMonthly Notices of the Royal Astronomical Society
ISSN0035-8711
Volume508Pages:3910
SubtypeJournal Article
Abstract

The High Energy (HE) X-ray telescope on board the Hard X-ray Modulation Telescope (Insight-HXMT) can serve as a wide field of view (FOV) gamma-ray monitor with high time resolution (̳) and large effective area (up to thousands cm2). 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. Fermi/GBM, 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 Insight-HXMT/HE data, our targeted search recovered 40 GRBs, which were detected by either Swift/BAT or Fermi/GBM but too weak to be found in our blind search. With this coherent search pipeline, the GRB detection sensitivity of 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 Insight-HXMT/HE data for electromagnetic counterparts of LIGO-Virgo GW events (including O2 and O3a runs). However, we did not find any significant burst associated with GW events.

Keywordgravitational waves methods: observational gamma-ray bursts Astrophysics - High Energy Astrophysical Phenomena
DOI10.1093/mnras/stab2760
ADS Bibcode2021MNRAS.508.3910C
ADS URLhttps://ui.adsabs.harvard.edu/abs/2021MNRAS.508.3910C
Citation statistics
Cited Times:5 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/289792
Collection粒子天体物理中心
硬X射线调制望远镜卫星
Recommended Citation
GB/T 7714
Cai, C.,Xiong, S. L.,Li, C. K.,et al. Search for gamma-ray bursts and gravitational wave electromagnetic counterparts with High Energy X-ray Telescope of Insight-HXMT[J]. Monthly Notices of the Royal Astronomical Society,2021,508:3910.
APA Cai, C..,Xiong, S. L..,Li, C. K..,Liu, C. Z..,Zhang, S. N..,...&Zhou, D. K..(2021).Search for gamma-ray bursts and gravitational wave electromagnetic counterparts with High Energy X-ray Telescope of Insight-HXMT.Monthly Notices of the Royal Astronomical Society,508,3910.
MLA Cai, C.,et al."Search for gamma-ray bursts and gravitational wave electromagnetic counterparts with High Energy X-ray Telescope of Insight-HXMT".Monthly Notices of the Royal Astronomical Society 508(2021):3910.
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