[vsnet-grb-info 22891] IceCube-190704A: Upper limits from Insight-HXMT/HE observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sat Jul 6 12:08:19 JST 2019
TITLE: GCN CIRCULAR
NUMBER: 24990
SUBJECT: IceCube-190704A: Upper limits from Insight-HXMT/HE observations
DATE: 19/07/06 03:07:05 GMT
FROM: QiBin Yi at IHEP, HXMT <yiqb at ihep.ac.cn>
Q. B. Yi, C. Cai, Q. Luo, S. Xiao, Y. G. Zheng,
Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong,
C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang,
Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin,
Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song,
M. Wu, Y. P. Xu, S. N. Zhang (IHEP),
report on behalf of the Insight-HXMT team:
Insight-HXMT was taking data normally around the trigger time
(T0=2019-07-04 18:48:52.25 UTC) of this high-energy neutrino event
(GCN #24981), which was monitored without any 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 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: 2.6e-07 erg cm^-2
10s:5.0e-07 erg cm^-2
Band model 2 (alpha=-1.0, beta=-2.3, Ep=230 keV):
1s: 3.6e-07 erg cm^-2
10s: 8.0e-07 erg cm^-2
Band model 3 (alpha=-0.0, beta=-1.5, Ep=1000 keV):
1s: 3.6e-07 erg cm^-2
10s: 2.4e-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 (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.
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