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GCN Circular 24563

Subject
GRB 190515A: Insight-HXMT/HE detection
Date
2019-05-16T07:52:53Z (5 years ago)
From
Shuo Xiao at IHEP <xiaoshuo@ihep.ac.cn>
S. Xiao, C. Cai, Q. Luo, 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,
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 2019-05-15T04:33:03.000 (T0), Insight-HXMT/HE detected 
GRB 190515A(trigger ID: HEB190515189) in a routine search of the data, 
which was also triggered by Fermi/GBM (GCN#24550), Fermi/LAT (D. Kocevski 
et al., GCN#24560) and Swift/XRT (M. J. Moss et al., GCN#24553). 

The Insight-HXMT/HE light curve mainly consists of single  
pulse with a duration (T90) of 0.44 s measured from T0+0.02 s. 
The 1-ms peak rate, measured from T0+0.20 s, is 5641 cnts/sec. 
The total counts from this burst is 1906 counts. 
URL_LC: http://www.hxmt.org/images/GRB/HEB190515189_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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