GCN Circular 24036

Q. Luo, 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 2019-03-31T02:14:38.000 (T0), the Insight-HXMT/HE detected
GRB 190331A(trigger ID: HEB190331093) in a routine search of the data,
which was also triggered by Swift/BAT(K. L. Page et al. ,GCN 24027)
and Fermi/GBM (M. Niwano et al. ,GCN 24032).

The Insight-HXMT/HE light curve mainly consists of one 
pulse with a duration (T90) of 7.65 s measured from T0+0.13 s.
The 1-ms peak rate, measured from T0+0.271 s, is 1552 cnts/sec.
The total counts from this burst is 1691 counts.
URL_LC: http://www.hxmt.org/images/GRB/HEB190331093_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 about it could be found at:
http://www.hxmt.org.