[vsnet-grb-info 27491] GRB 210228B: Insight-HXMT/HE detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Fri Mar 5 17:48:09 JST 2021
TITLE: GCN CIRCULAR
NUMBER: 29594
SUBJECT: GRB 210228B: Insight-HXMT/HE detection
DATE: 21/03/05 08:47:07 GMT
FROM: Wangchen Xue at IHEP <xuewc at ihep.ac.cn>
W. C. Xue, C. Cai, J. C. Liu, Q. Luo, S. Xiao,
Q. B. Yi, Y. Q. Zhang, C. Zheng, Y. Huang, C. K. Li,
G. Li, X. B. Li, J. Y. Liao, X. Y. Song, 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:
At 2021-02-28T01:22:53.900 (T0), Insight-HXMT/HE detected
GRB 210228B (trigger ID: HEB210228057) in a routine search of the data,
which also triggered Fermi/GBM (Trig# 635922820) and IPN.
The Insight-HXMT/HE light curve mainly consists of multiple
pulses with a duration (T90) of 1.66 s measured from T0-0.11 s.
The 1-ms peak rate, measured from T0+0.03 s, is 4418 cnts/sec.
The total counts from this burst is 2916 counts.
URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB210228057_lc.jpg
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 telescope.
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 about it could be found at:
http://www.hxmt.org.
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