[vsnet-grb-info 20941] GRB 180722B: Insight-HXMT/HE detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23039
SUBJECT: GRB 180722B: Insight-HXMT/HE detection
DATE:    18/07/26 03:38:40 GMT
FROM:    Yue Huang at IHEP  <huangyue at ihep.ac.cn>

Y. Huang, G. Li, S. L. Xiong, X. B. Li, C. K. Li, C.Z. Liu, 
X.F. Li, Z. W. Li, Z. Chang, J. L. Zhao, 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, 
H. Y. Wang, M. Wu, Y. P. Xu, S. N. Zhang (IHEP),
report on behalf of the Insight-HXMT team:
 
At 2018-07-22T23:49:13.000 (T0), the Insight-HXMT/HE detected
GRB 180722B(trigger ID: HEB180722992) in a routine search of the data,
which was also triggered by Fermi-GBM (trigger #553996158), 
Konus-Wind (trigger time 23:49:18.90 UT) and CALET 
(T. Tamura et al., GCN23028).
 
The Insight-HXMT/HE light curve consists of two broad pulses
with a duration (T90) of 49.2 s measured from T0+0.4 s.
The 1-s peak rate, measured from T0+41.5 s, is 1679.3 cnts/sec.
The total counts from this burst is 27707.0 counts.
 
URL_LC: http://www.hxmt.org/images/GRB/HEB180722992_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 (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.
 
The analysis results presented above are preliminary, 
final results will be published elsewhere.
  
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.