IHEP OpenIR  > 硬X射线调制望远镜卫星
LIGO/Virgo S191216ap: Upper limits from Insight-HXMT/HE observations
Luo, Q; Zheng, Y. G; Cai, C; Xiao, S; Yi, Q. B; Huang, Y; Li, C. K; Li, G; Li, X. B; Liao, J. Y; Xiong, S. L; Liu, C. Z; Li, X. F; Li, Z. W; Chang, Z; Zhang, A. M; Zhang, Y. F; Lu, X. F; Zou, C. L; Jin, Y. J; Zhang, Z; Li, T. P; Lu, F. J; Song, L. M; Wu, M; Xu, Y. P; Zhang, S. N.; Team, Insight-HXMT
GCN Number26569
2019-12-23
Source PublicationGRB Coordinates Network
AbstractInsight-HXMT was taking data normally around the reported LIGO/Virgo S191216ap GW event (GCN #26454). At the GW trigger time 2019-12-16T21:33:38.473 UTC (denoted as T0), 0.96% of the GW localization region was covered by the 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 GW location probability map (RA=288.6 deg, DEC=61.1 deg) without occultation by the Earth, 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: 5.8e-08 erg cm^-2 10 s: 1.9e-07 erg cm^-2 Band model 2 (alpha=-1.0, beta=-2.3, Ep=230 keV): 1 s: 1.0e-07 erg cm^-2 10 s: 3.4e-07 erg cm^-2 Band model 3 (alpha=-0.0, beta=-1.5, Ep=1000 keV): 1 s: 2.7e-07 erg cm^-2 10 s: 1.1e-06 erg cm^-2 Futhermore, from T0-15 minutes to T0+21 minutes, both the IceCube counterpart neutrino candidate (GCN #26450) and the HAWC sub-threshold event (GCN #26472) were invisible to Insight-HXMT due to the Earth shielding. Assuming that the counterpart GRB comes from the HAWC location (RA=323.5 deg, DEC=5.2 deg), we estimated 5-sigma upper-limits (0.2 - 5 MeV, incident energy) of the extended emission of this GRB at 2019-12-16T21:55:00.000 UTC (T0+1281.527 s) as follows: Band model 1 (alpha=-1.9, beta=-3.7, Ep=70 keV): 1 s: 2.0e-08 erg cm^-2 10 s: 1.0e-07 erg cm^-2 Band model 2 (alpha=-1.0, beta=-2.3, Ep=230 keV): 1 s: 3.5e-08 erg cm^-2 10 s: 1.7e-07 erg cm^-2 Band model 3 (alpha=-0.0, beta=-1.5, Ep=1000 keV): 1 s: 1.5e-07 erg cm^-2 10 s: 5.6e-07 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.
ADS URLhttps://ui.adsabs.harvard.edu/abs/2019GCN.26569....1L
ADS Bibcode2019GCN.26569....1L
GCN URLhttps://gcn.gsfc.nasa.gov/gcn/gcn3/26569.gcn3
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Cited Times:0 [ADS]
Document TypeGCN
Identifierhttp://ir.ihep.ac.cn/handle/311005/287693
Collection硬X射线调制望远镜卫星
多学科研究中心
Affiliation中国科学院高能物理研究所
Recommended Citation
GB/T 7714
Luo, Q,Zheng, Y. G,Cai, C,et al. LIGO/Virgo S191216ap: Upper limits from Insight-HXMT/HE observations. 2019.
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