TITLE: GCN CIRCULAR NUMBER: 6182 SUBJECT: GRB 070309: A long GRB detected by INTEGRAL DATE: 07/03/09 11:42:41 GMT FROM: Sandro Mereghetti at IASF/CNR A.Paizis, S.Mereghetti (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 40 s has been detected by IBAS in IBIS/ISGRI data on March 9 at 10:01:03 UT The coordinates (J2000) are: RA: 263.6848 [degrees] DEC: -37.9446 [degrees] with an uncertainty of 2.5 arcmin (90% c.l.). Preliminary analysis of the IBIS data indicates a peak flux of 0.2 photons/cmq s (20-200 keV, 1 s integration time) and a fluence of 5x10e-7 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.