GCN Circular 37630
Subject
GRB 240929A long GRB detected by INTEGRAL
Date
2024-09-29T21:00:52Z (3 months ago)
From
Sandro Mereghetti at IASF-Milano/INAF <sandro.mereghetti@inaf.it>
Via
Web form
S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, 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 19:50:02 UT of 2024 September 29.
The refined coordinates (J2000) are:
R.A.= 2.4233 deg
DEC.= 74.8275 deg
with an uncertainty of 2 arcmin (90% c.l.).
A preliminary analysis gives a peak flux of about 5 ph/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 3e-6 erg/cmq.
Due to telemetry saturation, these values should be considered as lower limits.
This burst has also been detected by Fermi/GBM (GCN 37627).
A plot of the light curve will be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html