TITLE: GCN CIRCULAR NUMBER: 23795 SUBJECT: Trigger 885807: Swift detection of MAXI J1348-630 DATE: 19/01/26 11:05:39 GMT FROM: Kim Page at U.of Leicester V. D'Elia (SSDC), A. Y. Lien (GSFC/UMBC) and K. L. Page (U Leicester) report on behalf of the Neil Gehrels Swift Observatory Team: At 10:37:53 UT, the Swift Burst Alert Telescope (BAT) triggered and located MAXI J1348-630 (trigger=885807). Swift slewed immediately to the source. The BAT on-board calculated location is RA, Dec 207.003, -63.265 which is RA(J2000) = 13h 48m 01s Dec(J2000) = -63d 15' 54" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure. The peak count rate was ~2500 counts/sec (15-350 keV), at ~4 sec after the trigger. The XRT began observing the field at 10:48:44.0 UT, 650.4 seconds after the BAT trigger. The XRT centroided on a cosmic ray, so the automatic position notice is incorrect. There are no other data available at this time. There are no UVOT data available at this time. This source was discovered by MAXI at 03:16 UT this morning (ATel 12425)