TITLE: GCN CIRCULAR NUMBER: 25528 SUBJECT: GRB 190828D: A long GRB detected by INTEGRAL DATE: 19/08/28 19:53:38 GMT FROM: Sandro Mereghetti at IASF-Milano/INAF S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), E.Bozzo, C.Ferrigno, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC, Versoix) and J.Borkowski (CAMK, Torun) report: a gamma ray burst lasting about 20 s has been detected by IBAS in the IBIS/ISGRI data at 18:48:30 UT of August 28, 2019. The refined coordinates (J2000) are: R.A.= 251.9247 deg DEC.= -24.5498 deg with an uncertainty of 2.5 arcmin (90% c.l.). The burst had a peak flux of 0.7 counts/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 7e-7 erg/cmq. A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html