TITLE: GCN CIRCULAR NUMBER: 21326 SUBJECT: GRB 170710C: a long GRB detected by INTEGRAL DATE: 17/07/12 10:29:14 GMT FROM: Sandro Mereghetti at IASF-Milano/INAF S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo,and J.Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: a gamma ray burst lasting about 30 s has been detected by IBAS in the IBIS/ISGRI data at 05:05:15 UT of July 10, 2017. Its significance was below the threshold for automatic alert delivery The refined coordinates (J2000) are: R.A.= 352.2526 deg DEC.= +51.2935 deg with an uncertainty of 2.5 arcmin (90% c.l.). The burst had a peak flux of 0.3 counts/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 4x10e-7 erg/cmq. A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html