TITLE: GCN CIRCULAR NUMBER: 8138 SUBJECT: Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts DATE: 08/08/26 15:50:37 GMT FROM: Chryssa Kouveliotou at MSFC Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts C. Kouveliotou (NASA/MSFC), P.N. Bhat (UAH), E. Bissaldi (MPE), M.S. Briggs (UAH), V. Connaughton (UAH), R. Diehl (MPE), G.J. Fishman (NASA/MSFC), L. Gibby (NASA/MSFC), J. Greiner (MPE), A.S. Hoover (LANL), A.J. van der Horst (NASA/ORAU), R.M. Kippen (LANL), G.G. Lichti (MPE), C.A. Meegan (NASA/MSFC), S. McBreen (MPE), W.S. Paciesas (UAH), R.D. Preece (UAH), H. Steinle (MPE), A. von Kienlin (MPE), M.S. Wallace (LANL), and C.A. Wilson-Hodge (NASA/MSFC)report: The GLAST Burst Monitor has thus far triggered on 23 bursts from SGR 0501+5416, newly discovered with Swift (Holland et al. 2008, GCN Circ. 8112, Barthelmy et al. 2008, GCN 8113 and GCN 8119). Additional un-triggered bursts have been detected in the data; a complete census is underway. The first GBM trigger was on 2008, August 22 (von Kienlin et al. 2008, GCN 8122). The GBM team will issue future individual GCN Circulars only for exceptionally bright SGR events. The GBM triggered-event rate has peaked at 14 events on 2008 August 23 and seems to be slowing down with only 2 on 2008, August 26. We have so far identified five events in common with Swift and three with Konus-Wind. The event intensities range from weak to very bright; their durations range between ~50 - 500 msec. Event spectra are on the average best fit with a power law with an exponential cutoff and peak energies ~ 40-50 keV. Taking into account the source location at the Galactic anti-center, we assume a distance between 2-5 kpc, which corresponds to a range of burst luminosities ~10^37 - 10^40 ergs.