TITLE: GCN CIRCULAR NUMBER: 10298 SUBJECT: GRB 091230: a long GRB detected by INTEGRAL DATE: 09/12/30 07:57:12 GMT FROM: Sandro Mereghetti at IASF/CNR D.Gotz (CEA-Saclay), S. Mereghetti, A.Paizis (IASF-Milano), E.Bozzo, L.Gibaud, C.Ferrigno, M. Beck (ISDC, Versoix), and J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: A GRB with duration of about 120 s has been detected by IBAS in IBIS/ISGRI data at 06:27:30 UT on December 30. The refined coordinates (J2000) are: RA: 132.9146 [degrees] DEC: -53.8825 [degrees] with an uncertainty of 2.5 arcmin (90% c.l.). A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html This message can be cited.