[vsnet-grb-info 26390] GRB 200922A: Insight-HXMT/HE detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28490
SUBJECT: GRB 200922A: Insight-HXMT/HE detection
DATE:    20/09/24 11:02:22 GMT
FROM:    YaoGuang Zheng at IHEP  <zhengyg at ihep.ac.cn>

Y. Q. Zhang, Y. G. Zheng, C. Cai, Q. Luo, S. Xiao, Q. B. Yi, 
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:

At 2020-09-22T12:06:46.00 (T0), Insight-HXMT/HE detected 
GRB 200922A (trigger ID: HEB200922504) in a routine search of the data, 
which also triggered Swift/BAT (Moss et al., GCN #28471).

The Insight-HXMT/HE light curve mainly consists of single  
pulses with a duration (T90) of 1.87 s measured from T0+0.04 s. 
The 1-ms peak rate, measured from T0+0.18 s, is 629 cnts/sec. 
The total counts from this burst is 742 counts. 
URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB200922504_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.