GCN Circular 13300
Subject
GRB 120512A: A long GRB detected by INTEGRAL
Date
2012-05-15T12:23:22Z (12 years ago)
From
Sandro Mereghetti at IASF/CNR <sandro@iasf-milano.inaf.it>
S.Mereghetti (IASF-Milano), C.Ferrigno, E.Bozzo (ISDC, Versoix), D.Gotz
(CEA, Saclay), and J.Borkowski (CAMK, Torun) on behalf of the IBAS
Localization Team report:
a gamma ray burst lasting about 40 s has been detected by IBAS in the
IBIS/ISGRI data at 02:41:40 UT of May 12.
Due to the 7.3 sigma statistical significance of the detection, only an
Alert Packet of WEAK type was distributed in real time (Packet n. 6550).
With an off-line analysis with the standard OSA software we obtained the
following GRB coordinates (J2000):
RA: 325.558 [degrees]
DEC: 13.636 [degrees]
with an uncertainty of 1 arcmin (90% c.l.).
These coordinates differ from those derived automatically (Alert Packet
n.6550) because the extreme off-axis angle of the GRB (15 degrees) caused
a wrong identification of its position in the real time image.
The burst has a peak flux of 5 counts/cm2/s (20-200 keV, 1-s integration
time) and a fluence in the same energy range of about 1e-5 erg/cm2,
A plot of the light curve has been posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html