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	LIGO/Virgo S190930t: Upper limits from Insight-HXMT/HE observations
	Luo, Q; Yi, Q. B; Xiao, S; Cai, C; Zheng, Y. G; Huang, Y; Li, C. K; Li, X. B; Li, G; Liao, J. Y
	2019-10-03
出处	GRB Coordinates Network
英文摘要	Insight-HXMT was taking data normally around the reported LIGO/Virgo S190930t event (GCN #25876), trigger time 2019-09-30T14:34:07 UTC. At T0, about 77% of the LIGO localization region was covered by Insight- HXMT without occultation by the Earth. Within T0 +/- 100 s, no significant excess events (SNR > 3 sigma) are found in a search of the Insight-HXMT/HE raw light curves. Assuming the GW counterpart GRB with three typical GRB Band spectral models, two typical duration timescales (1 s, 10 s) from the center of the LIGO-Virgo location probability map (RA=136 deg, DEC=31 deg), the 5-sigma upper-limits fluence (0.2 - 5 MeV, incident energy) are reported below: Band model 1 (alpha=-1.9, beta=-3.7, Ep=70 keV): 1 s: 7.0e-08 erg cm^-2 10 s: 3.2e-07 erg cm^-2 Band model 2 (alpha=-1.0, beta=-2.3, Ep=230 keV): 1 s: 1.1e-07 erg cm^-2 10 s: 5.1e-07 erg cm^-2 Band model 3 (alpha=-0.0, beta=-1.5, Ep=1000 keV): 1 s: 3.2e-07 erg cm^-2 10 s: 1.4e-06 erg cm^-2 All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (deposited energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the spacecraft. Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information could be found at: http://www.hxmt.org.
内容类型	GCN
源URL	[http://ir.ihep.ac.cn/handle/311005/287672]
专题	硬X射线调制望远镜卫星 高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Luo, Q,Yi, Q. B,Xiao, S,et al. LIGO/Virgo S190930t: Upper limits from Insight-HXMT/HE observations. 2019.

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