[vsnet-grb-info 23780] GRB 190928A: Insight-HXMT/HE detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  25879
SUBJECT: GRB 190928A: Insight-HXMT/HE detection
DATE:    19/09/30 15:50:41 GMT
FROM:    Qi Luo at IHEP  <luoqi at ihep.ac.cn>

Q. Luo, C. Cai, S. Xiao, Q. B. Yi, Y. G. Zheng, Y. Huang, 
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, 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 2019-09-28T13:12:14.00 (T0), Insight-HXMT/HE detected 
GRB 190928A (trigger ID: HEB190928550) in a routine search of the data, 
which was also reported by AGILE/MCAL (GCN #25859), IPN triangulation 
(GCN #25864), CALET/GBM (GCN #25865) and Konus-Wind (GCN #25868). 

The Insight-HXMT/HE light curve mainly consists of multiple 
pulses with a duration (T90) of 31.10 s measured from T0+78.39 s. 
The 1-ms peak rate, measured from T0+102.88 s, is 23712 cnts/sec. 
The total counts from this burst is 152469 counts. The data of 
Insight-HXMT/HE suffers saturation in the brightest part.
URL_LC: http://www.hxmt.org/images/GRB/HEB190928550_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.