[vsnet-grb-info 21468] GRB 181225A: Insight-HXMT/HE detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Dec 27 23:07:24 JST 2018
TITLE: GCN CIRCULAR
NUMBER: 23567
SUBJECT: GRB 181225A: Insight-HXMT/HE detection
DATE: 18/12/27 14:05:53 GMT
FROM: QiBin Yi at IHEP, HXMT <yiqb at ihep.ac.cn>
Q. B. Yi, C. K. Li, X. B. Li, G. Li, J. Y. Liao, S. L. Xiong,
C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, X. F. Lu, J. L. Zhao,
A. M. Zhang, Y. F. Zhang, C. L. Zou (IHEP), Y. J. Jin,
Z. Zhang (THU), T. P. Li (IHEP/THU), L. M. Song,
M. Wu, Y. P. Xu, S. N. Zhang (IHEP),
report on behalf of the Insight-HXMT team:
At 2018-12-25T11:44:10.000 (T0), the Insight-HXMT/HE detected
GRB 181225A (trigger ID: HEB181225489) in a routine search of the data,
which was also triggered by by AGILE/MCAL (A. Ursi et al.,GCN23560)、
Fermi/LAT (M. Arimoto et al., GCN23561) and Fermi/GBM (S.Poolakkil., GCN23562).
The Insight-HXMT/HE light curve mainly consists of multiple
pulses with a duration (T90) of 1.23 s measured from T0+0.46 s.
The 50-ms peak rate, measured from T0+1.208 s, is 2963.2 cnts/s.
The total counts from this burst 2350.8 counts.
URL_LC: http://www.hxmt.org/images/GRB/HEB181225489_lc.jpg
All measurements above are made with the CsI detectors operating in the
GRB mode with the energy range of about 200-3000 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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