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GCN Circular 33082

Subject
GRB 221218A: a long GRB detected by INTEGRAL
Date
2022-12-18T21:56:21Z (a year ago)
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
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