[vsnet-grb-info 23982] GRB 191025B: Insight-HXMT/HE detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  26081
SUBJECT: GRB 191025B: Insight-HXMT/HE detection
DATE:    19/10/28 03:31:23 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 2019-10-25T18:42:09.10 (T0), Insight-HXMT/HE detected 
GRB 191025A (trigger ID: HEB191025779) in a routine search of the data, 
which was also triggered by INTEGRAL/SPIACS (Trigger Number: 8394) and 
Konus-Wind. 

The Insight-HXMT/HE light curve mainly consists of multiple 
pulses with a duration (T90) of 0.145 s measured from T0+0.03 s. 
The 1-ms peak rate, measured from T0+0.123 s, is 63021 cnts/sec. 
The total counts from this burst is 2544 counts. The data of 
Insight-HXMT/HE suffers saturation in the brightest part.
URL_LC: http://www.hxmt.org/images/GRB/HEB191025779_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.