[vsnet-grb-info 21899] GRB 190321A: Insight-HXMT/HE detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23998
SUBJECT: GRB 190321A: Insight-HXMT/HE detection
DATE:    19/03/25 00:52:58 GMT
FROM:    QiBin Yi at IHEP, HXMT  <yiqb at ihep.ac.cn>

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 2019-03-21T22:21:21.000 (T0), the Insight-HXMT/HE detected 
GRB 190321A (trigger ID: HEB190321931) in a routine search of the data. 

The Insight-HXMT/HE light curve mainly consists of multiple 
pulses with a duration (T90) of 5.07 s measured from T0+0.65 s. 
The 1-ms peak rate, measured from T0+0.695 s, is 3598 cnts/s. 
The total counts from this burst is 7360 counts. 
URL_LC: http://www.hxmt.org/images/GRB/HEB190321931_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 could be found at: http://www.hxmt.org.