TITLE: GCN CIRCULAR NUMBER: 6189 SUBJECT: GRB 070311: a long GRB detected by INTEGRAL DATE: 07/03/11 03:06:14 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti, A.Paizis (IASF-Milano), D.Gotz (CEA-Saclay), I.Kreykenbohm, N.Mowlavi, M. Beck (ISDC, Versoix), and J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: A GRB lasting about 50 s has been detected by IBAS in IBIS/ISGRI data on March 11 at 01:52:50 UT The coordinates (J2000) are: RA = 87.5411 deg DEC = 3.3748 deg with an uncertainty of 2.5 arcmin (90% c.l.). Preliminary analysis of the IBIS data indicates a peak flux of 0.9 photons/cmq s (20-200 keV, 1 s integration time) and a fluence of 2x10e-6 erg/cmq A plot of the light curve will be posted at http://ibas.mi.iasf.cnr.it/IBAS_Results.html This message can be cited.