TITLE: GCN CIRCULAR NUMBER: 12322 SUBJECT: GRB 110903A: a long GRB detected by INTEGRAL DATE: 11/09/03 03:54:34 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti (IASF-Milano), D.Gotz (CEA-Saclay), J. Borkowski (CAMK, Torun), C.Ferrigno, E.Bozzo (ISDC, Versoix), on behalf of the IBAS Localization Team report: a long gamma ray burst lasting about 400 s has been detected by IBAS in the IBIS/ISGRI data at 02:39:55 UT of September 3. Its refined coordinates (J2000) are: RA: 197.0614 [degrees] DEC: 58.9852 [degrees] with an uncertainty of 2 arcmin (90% c.l.). The light curve consists of three main peaks starting approximately at t0, t0+200 s, and t0+300 s. The high count rate of the burst saturated the ISGRI telemetry. A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html