TITLE: GCN CIRCULAR NUMBER: 23465 SUBJECT: GRB 181127A : a long GRB detected by INTEGRAL DATE: 18/11/27 10:36:54 GMT FROM: Sandro Mereghetti at IASF-Milano/INAF 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 15 s has been detected by IBAS in the IBIS/ISGRI data at 06:46:20 UT of November 27, 2018. The burst was detected with a significance below the threshold for automatic alert delivery (IBAS Weak Alert n.8167 was distributed at 06:46:50 UT). The refined coordinates (J2000) are: R.A.= 285.3433 deg DEC.= 31.6895 deg with an uncertainty of 2.5 arcmin (90% c.l.). The burst had a peak flux of 0.5 counts/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 4e-7 erg/cmq. A plot of the light curve is posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html