GRB 190828D
GCN Circular 25528
Subject
GRB 190828D: A long GRB detected by INTEGRAL
Date
2019-08-28T19:53:38Z (6 years ago)
From
Sandro Mereghetti at IASF-Milano/INAF <sandro.mereghetti@inaf.it>
S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), E.Bozzo,
C.Ferrigno, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC,
Versoix) and J.Borkowski (CAMK, Torun) report:
a gamma ray burst lasting about 20 s has been detected by IBAS in the
IBIS/ISGRI data at 18:48:30 UT of August 28, 2019.
The refined coordinates (J2000) are:
R.A.= 251.9247 deg
DEC.= -24.5498 deg
with an uncertainty of 2.5 arcmin (90% c.l.).
The burst had a peak flux of 0.7 counts/cm2/s (20-200 keV, 1-s
integration time) and a fluence in the same energy range of about 7e-7
erg/cmq.
A plot of the light curve will be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN Circular 25576
Subject
GRB 190828D: Insight-HXMT/HE detection
Date
2019-08-30T12:59:32Z (6 years ago)
From
Qi Luo at IHEP <luoqi@ihep.ac.cn>
J. M. Yao, Y. G. Zheng, C. Cai, Q. Luo, S. Xiao, Q. B. Yi,
Y. Huang, C. K. Li, G. Li, X. B. 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 2019-08-28T18:48:33.70 (T0), Insight-HXMT/HE detected
GRB 190828D (trigger ID: HEB190828783) in a routine search of the data,
which was also triggered by INTEGRAL (GCN #25528).
The Insight-HXMT/HE light curve mainly consists of multiple
pulses with a duration (T90) of 5.21 s measured from T0+0.03 s.
The 1-ms peak rate, measured from T0+0.03 s, is 4001 cnts/sec.
The total counts from this burst is 5857 counts.
URL_LC: http://www.hxmt.org/images/GRB/HEB190828783_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.