GCN Circular 2415
S. Mereghetti, D.Gotz (IASF, Milano) and M. Beck (ISDC) for the ISDC IBAS Localization Team, F. Mirabel (CEA, Saclay) and the INTEGRAL Science Working Team report: During INTEGRAL Core Program observations of the Galactic Center region, IBAS has detected several bursts from SGR 1806-20. They are summarized in the following Table. The positions derived by IBAS with typical errors smaller than 3 arcmin confirm that all of them originated from SGR 1806-20 and not from the nearby sources SGR 1808-20 (GCN 2351) or XTE J1810-197 (IAUC 8168, IAUC 8190). The bursts were detected with the IBIS/ISGRI instrument in the 15-100 keV energy range. Date October 2003 25-100 keV Fluence Duration Day UT (erg cm-2) (s) 6 18:51:27.4 3 x 10-8 0.06 GCN 2408 8 03:27:03.9 4 x 10-7 0.2 (*) 8 03:27:56.1 3 x 10-7 0.2 (*) 8 20:22:06.5 4 x 10-8 0.1 (*) IPN observations of this burst have been reported (GCN 2414) In the near future IBAS will start to distribute automatic Alert Packets for SGR bursts detected with high significance. This will allow rapid follow-up observations at other wavelengths. The source coordinates in the Alert Packets will allow IBAS users to distinguish such events from classical GRBs. This message can be cited.