TITLE: GCN CIRCULAR NUMBER: 22947 SUBJECT: GRB 180715A: Swift detection of a short hard burst DATE: 18/07/15 18:15:11 GMT FROM: David Palmer at LANL T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC), S. W. K Emery (UCL-MSSL), J.D. Gropp (PSU), S. J. LaPorte (PSU), A. Y. Lien (GSFC/UMBC), Z. Liu (NAOC/U. Leicester), D. M. Palmer (LANL) and A. Tohuvavohu (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: At 18:07:05 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 180715A (trigger=848048). Swift could not immediately slew to the location due to the Earth limb constraint. The BAT on-board calculated location is RA, Dec 235.069, -0.925 which is RA(J2000) = 15h 40m 17s Dec(J2000) = -00d 55' 28" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single short peak structure with a duration of about 0.7 sec. The peak count rate was ~6000 counts/sec (15-350 keV), at ~0 sec after the trigger. Due to an observing constraint, Swift will not slew until T0+50.9 minutes. There will be no XRT or UVOT data until this time. Burst Advocate for this burst is T. N. Ukwatta (tilan.ukwatta AT gmail.com). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)