TITLE: GCN CIRCULAR NUMBER: 15607 SUBJECT: GRB 131224A: A short GRB detected by INTEGRAL DATE: 13/12/24 18:17:19 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), E.Bozzo, C.Ferrigno, D.Malishev (ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: a short gamma ray burst lasting about 0.8 s has been detected by IBAS in the IBIS/ISGRI data at 16:54:37 UT of 24 December. The refined coordinates (J2000) are: R.A.= 296.8337 deg DEC.= +31.6677 deg with an uncertainty of 2 arcmin (90% c.l.). The burst had a peak flux of about 1 counts/cm2/s (20-200 keV, 0.1-s integration time) and a fluence in the same energy range of about 3x10e-8 erg/cmq. A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html