TITLE: GCN CIRCULAR NUMBER: 8124 SUBJECT: Trigger 321551: Continued Large Flaring of SGR 0501+4516 DATE: 08/08/23 11:56:13 GMT FROM: David Palmer at LANL N. Gehrels (NASA/GSFC), J. Mao (INAF-OAB), D. M. Palmer (LANL), M. Perri (ASDC), B. Preger (ASDC), G. Stratta (ASDC) and L. Vetere (PSU) report on behalf of the Swift Team: At 11:27:35 UT, the Swift Burst Alert Telescope (BAT) triggered on a large flare from the newly discovered SGR 0501+4516 (trigger=321551). Swift was already observing this source location due to a previous trigger on this source. The BAT on-board calculated location is RA, Dec 75.265, +45.281 which is RA(J2000) = 05h 01m 04s Dec(J2000) = +45d 16' 52" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a roughly flat-topped structure with a duration of about 0.256 sec. The peak count rate was ~300k counts/sec (15-350 keV), at ~0.2 sec after the trigger. The BAT burst response algorithm causes a TDRSS alert only when a known source exceeds twice its previous fluence, so additional large flares may have occurred since the previously-reported large flare at 4:47:48 UT. Ground processing of Malindi data will be required to report on other activity by this source. [GCN OPS NOTE(25aug08): Per author's request, the end of the second sentence was changed from "...due to its previous." to "...due to a previous trigger on this source.".]