GCN Circular 8734
S.Mereghetti, A.Paizis (IASF-Milano), D.Gotz (CEA-Saclay), M.Turler, V.Beckmann, M. Beck (ISDC, Versoix), and J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: A short hard GRB consisting of a single peak with duration of about 0.7 s has been detected by IBAS in IBIS/ISGRI data at 12:13:11 UT on December 26th. The refined coordinates (J2000) are: RA = 25.495 [degrees] DEC= -47.439 [degrees] with an uncertainty of 2.5 arcmin (90% c.l.). A preliminary analysis gives a peak flux in the 20-200 keV range of about 3 ph/cmq/s (0.2 s integration time) and a fluence over the same energy range of about 10e-7 erg/cmq. A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html This message can be cited.