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IceCube-200227A : Upper limits from Insight-HXMT/HE observations
Luo, Q; Zheng, Y. G; Cai, C; Du, Y. F; Xue, W. 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 Number27250
Source PublicationGRB Coordinates Network
AbstractInsight-HXMT was taking data normally around the trigger time (T0=2020-02-27T05:36:31.50 UTC) of this high-energy neutrino candidate event (GCN #27235), which was monitored without any occultation by the Earth. Within T0 +/- 100 s, no significant excess events (SNR > 4 sigma) are found in a search of the Insight-HXMT/HE raw light curves. Assuming the counterpart GRB with three typical GRB Band spectral models, two typical duration timescales(1 s, 10 s) coming from the position of this neutrino event, 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): 1s: 1.0e-07 erg cm^-2 10s: 9.3e-07 erg cm^-2 Band model 2 (alpha=-1.0, beta=-2.3, Ep=230 keV): 1s: 1.6e-07 erg cm^-2 10s: 1.5e-06 erg cm^-2 Band model 3 (alpha=-0.0, beta=-1.5, Ep=1000 keV): 1s: 3.3e-07 erg cm^-2 10s: 2.6e-06 erg cm^-2 Further analysis will be reported in the following circulars. All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (record 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 telescope. Insight- HXMT is the first Chinese space X-ray telescope, which was fundedjointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information could be found at: http://www.hxmt.org.
ADS URLhttps://ui.adsabs.harvard.edu/abs/2020GCN.27250....1L
ADS Bibcode2020GCN.27250....1L
GCN URLhttps://gcn.gsfc.nasa.gov/gcn/gcn3/27250.gcn3
Document TypeGCN
Recommended Citation
GB/T 7714
Luo, Q,Zheng, Y. G,Cai, C,et al. IceCube-200227A : Upper limits from Insight-HXMT/HE observations. 2020.
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