GRB 170730A
GCN Circular 21392
Subject
GRB170730A detecetd by INTEGRAL. Refined analysis
Date
2017-07-30T14:19:45Z (9 years ago)
From
Sandro Mereghetti at IASF-Milano/INAF <sandro@iasf-milano.inaf.it>
S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, and
J.Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report:
further analysis of the possible GRB 170730A detected as a subtrheshold
alert by IBAS in the IBIS/ISGRI data at 00:09:20 UT of July 30, 2017 (Gotz
et al. GCN 21390) yields the refined coordinates (J2000):
R.A.= 245.2996 deg
DEC.= -60.8866 deg
with an uncertainty of 2 arcmin (90% c.l.).
The burst lasted about 500 s, with a peak flux of about 0.6 photons/cm2/s
(20-200 keV, 1-s integration time) and a fluence in the same energy range
of about 1e-6 erg/cmq. The time averaged spectrum is consistent with a
power law with photon index ~2
A plot of the light curve will be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN Circular 21390
Subject
IBAS weak Alert nr.7881: possible GRB 170730A
Date
2017-07-30T07:45:59Z (9 years ago)
From
Diego Gotz at CEA <diego.gotz@cea.fr>
D.Gotz (CEA Saclay) on behalf of the IBAS Localization Team reports:
the weak IBAS Alert nr. 7881 corresponds to a weak transient source lasting about 100 s, starting at 00:09:32 UT on July 30th 2017, localized at
R.A: 245.3407 deg
Dec: -60.8832 deg
with an unceratinty of 2.5 arc min (90% c.l.).
We prliminarly classify it as a GRB, but we cannot exclude that it is a new Galactic source due to its low Galactic latitude.
Futher analysis is on-going.
This message can be cited.