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GCN Circular 25997

GRB 191009A: Insight-HXMT/HE detection
2019-10-11T11:14:37Z (5 years ago)
QiBin Yi at IHEP, HXMT <>
Q. B. Yi, S. Xiao, Q. Luo, C. Cai, 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,
A. M. Zhang, Y. F. Zhang, 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 2019-10-09T07:08:56.77 (T0), Insight-HXMT/HE detected 
GRB 191009A (trigger ID: HEB191009297) in a routine search of the data, 
which was also triggered by Fermi/GBM (GCN #25985). 

The Insight-HXMT/HE light curve mainly consists of a single  
pulse with a duration (T90) of 17.76 s measured from T0-1.56 s. 
The 1-ms peak rate, measured from T0+7.40 s, is 495 cnts/sec. 
The total counts from this burst is 1769 counts. 

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:
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