TITLE: GCN CIRCULAR NUMBER: 9815 SUBJECT: GRB 090817: a long GRB localized by INTEGRAL DATE: 09/08/17 02:53:44 GMT FROM: Volker Beckmann at ISDC V.Beckmann (ISDC, Versoix), D.Gotz (CEA-Saclay), S.Mereghetti, A.Paizis (IASF-Milano), A. Neronov, M. Beck (ISDC, Versoix), and J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: A long GRB with duration of about 250 s has been detected by IBAS in IBIS/ISGRI data at 00:51:33 UT on August 17th. The refined coordinates (J2000) are: RA: 63.9659 [degrees] DEC: +44.1234 [degrees] with an uncertainty of 2.6 arcmin (90% c.l.). The light curve shows two prominent peaks at T0 and at T0+196s. A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html This message can be cited.