GCN Circular 17552
Subject
GRB 150305A: a long GRB detected by INTEGRAL
Date
2015-03-09T12:41:36Z (9 years ago)
From
Sandro Mereghetti at IASF/CNR <sandro@iasf-milano.inaf.it>
S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo
(ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the IBAS
Localization Team report:
a gamma ray burst lasting at least 100 s has been detected by IBAS in the
IBIS/ISGRI data at 09:49:19 UT of March 5, 2015.
The refined coordinates (J2000) are:
R.A.= 269.7685 deg
DEC.= -42.6481 deg
with an uncertainty of 2.5 arcmin (90% c.l.).
The burst had a peak flux of about 0.2 counts/cm2/s (20-200 keV, 1-s
integration time) and a fluence in the same energy range of about 7e-7
erg/cmq (over 100 s).
Due to the significance of the detection below the high confidence
threshold, only an Alert Packet of WEAK type was distributed by IBAS in
real time (Packet n. 6905). The X-ray afterglow has been detected with
Swift/XRT (Starling 2015, GCN 17551).
A plot of the light curve can be found at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html