TITLE:   GCN CIRCULAR
NUMBER:  33082
SUBJECT: GRB 221218A: a long GRB detected by INTEGRAL
DATE:    22/12/18 21:56:21 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 140 s has been detected by IBAS in the
IBIS/ISGRI data at 08:14:10  UT of 2022 December 18.

The refined coordinates (J2000) are:
R.A.= 350.6495 deg
DEC.=  -4.2477 deg
with an uncertainty of  1  arcmin (90% c.l.).

The burst had a peak flux of 1 ph/cm2/s (20-200 keV, 1-s integration time)
and a fluence in the same energy range of about 5e-6 erg/cmq.

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