TITLE:   GCN CIRCULAR
NUMBER:  35541
SUBJECT: GRB 240115B: A long GRB detected by INTEGRAL
DATE:    24/01/15 19:53:08 GMT
FROM:    Sandro Mereghetti at IASF-Milano/INAF <sandro.mereghetti@inaf.it>

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 190 s has been detected by IBAS in the  IBIS/ISGRI data at 16:43:30  UT of 2024 Jan 15. The burst was detected at a large off-axis angle (about 13 degrees)  resulting in a low significance and large uncertainties. We note that the brightest part of the burst was also detected by the Fermi/GBM (GCN circ. 35540)

The refined coordinates (J2000) are:
R.A.= 191.894 deg
DEC.= -35.566 deg
with an uncertainty of 3.5 arcmin (90% c.l.).

The burst had a  fluence of about 4e-6  erg/cmq in the 20-200 keV range.

A plot of the light curve will be posted at 
http://ibas.iasf-milano.inaf.it/IBAS_Results.html