TITLE: GCN CIRCULAR NUMBER: 6932 SUBJECT: GRB 071018?: Swift detection of a possible burst DATE: 07/10/18 09:04:33 GMT FROM: Scott Barthelmy at NASA/GSFC H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), P. T. O'Brien (U Leicester), D. M. Palmer (LANL) and B. Sbarufatti (INAF-IASFPA) report on behalf of the Swift Team: At 08:37:41 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071018(?) (trigger=294645). The BAT on-board calculated location is RA, Dec 164.676, +53.830 which is RA(J2000) = 10h 58m 42s Dec(J2000) = +53d 49' 49" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). This was a 320-sec long image trigger, so the TDRSS lightcurve does not show any significant signal (as is typical). This location is well off the Galactic plane and does not mach any known sources in SIMBAD. Given that it is a long image trigger, this was automatically classifed as a transient instead of a GRB. We will need the full data set to determine if this is a burst or transient. Because Swift is in the process of returning to normal operations, automatic slewing to GRBs is currently disabled outside of business hours (US EDT). Therefore, there are no prompt XRT or UVOT observations of this burst. Burst Advocate for this burst is H. A. Krimm (krimm AT milkyway.gsfc.nasa.gov). 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.)