TITLE: GCN CIRCULAR NUMBER: 13369 SUBJECT: Swift Trigger 524642 is Swift J1910.2-0546 DATE: 12/06/18 19:52:20 GMT FROM: Scott Barthelmy at NASA/GSFC S. D. Barthelmy (GSFC), V. D'Elia (ASDC), S. T. Holland (STScI), H. A. Krimm (CRESST/GSFC/USRA), F. E. Marshall (NASA/GSFC), T. Sakamoto (NASA/UMBC), B. Sbarufatti (INAF-OAB/PSU), E. Sonbas (NASA/GSFC/Adiyaman Univ.) and G. Stratta (ASDC) report on behalf of the Swift Team: At 19:06:47 UT, the Swift Burst Alert Telescope (BAT) triggered on Swift J1910.2-0546 (trigger=524642). Swift will execute a delayed slewed due to the Earth observing constraint (49 min delay). The BAT on-board calculated location is RA, Dec 287.577, -5.806, which is RA(J2000) = 19h 10m 18s Dec(J2000) = -05d 48' 22" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is typical for image triggers (27 min), the TDRSS lightcurve does not show anything significant. Due to an observing constraint, Swift will not slew until 20:30UT. There will be no XRT or UVOT data until this time. Swift J1910.2-0546, discovered by BAT on May 30th, 2012 (Krimm et al., ATEL #4139), has been seen to be rising in the BAT Transient Monitor for several days, leading to this trigger.