TITLE: GCN CIRCULAR NUMBER: 30008 SUBJECT: GRB 210514A: Swift detection of a burst DATE: 21/05/14 19:02:01 GMT FROM: Kim Page at U.of Leicester E. Ambrosi (INAF-IASFPA), A. D'Ai (INAF-IASFPA), N. J. Klingler (PSU), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester) and B. Sbarufatti (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: The Swift Burst Alert Telescope (BAT) has triggered on a new event and Swift has slewed to the location of this trigger. The trigger time is believed to be no earlier than 17:08 UT. Given the loss of real-time antennae for half the sky, we are unable to confirm the nature, location, or exact time of this trigger until the full data have been downloaded, in approximately 3 hours (by around 22:00 UT). Limited XRT and UVOT data have been received. No counterpart is detected; however, given the location of the image centre, we infer that the BAT position must have been around RA,Dec = 2.9670, -21.8750 degrees (J2000.0), with an uncertainty of 12’. Burst Advocate for this burst is E. Ambrosi (elena.ambrosi AT inaf.it). 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/)