TITLE:   GCN CIRCULAR
NUMBER:  23355
SUBJECT: GRB 181018A: Insight-HXMT/HE detection
DATE:    18/10/21 05:54:23 GMT
FROM:    Shuo Xiao at IHEP  <xiaoshuo@ihep.ac.cn>

S. Xiao, 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, J. L. Zhao,
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, 
H. Y. Wang, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), 
report on behalf of the Insight-HXMT team: 

At 2018-10-18T06:07:25.000 (T0), the Insight-HXMT/HE detected 
GRB 181018A (trigger ID: HEB181018255) in a routine search of the data. 

The Insight-HXMT/HE light curve mainly consists of multiple 
pulses with a duration (T90) of 34.05 s measured from T0-4.06 s. 
The 1-s peak rate, measured from T0+24.33 s, is 1679.0 cnts/s. 
The total counts from this burst is 18937.0 counts. 
URL_LC:  http://www.hxmt.org/images/GRB/HEB181018255_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 (record 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 
fundedjointly by the China National Space Administration (CNSA) and 
the Chinese Academy of Sciences (CAS). 
More information could be found at: http://www.hxmt.org.

[GCN OPS NOTE(21oct18): Per author's request, the "A" suffix was
corrected to be in english text.]