TITLE: GCN CIRCULAR NUMBER: 28052 SUBJECT: GRB 200701A: Swift detection of a burst DATE: 20/07/01 12:58:38 GMT FROM: Boris Sbarufatti at PSU M. G. Bernardini (INAF-OAB), S. D. Barthelmy (GSFC), P. D'Avanzo (INAF-OAB), J.D. Gropp (PSU), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC), A. Melandri (INAF-OAB), K. L. Page (U Leicester), T. Sbarrato (INAF-OAB), B. Sbarufatti (PSU) and M. H. Siegel (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: At 12:46:59 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 200701A (trigger=980421). Swift did not slew immediately due to a Sun observing constraint. The BAT on-board calculated location is RA, Dec 123.555, -14.494 which is RA(J2000) = 08h 14m 13s Dec(J2000) = -14d 29' 37" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 40 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger. Due to a Sun observing constraint, Swift cannot slew to the BAT position until 06:11 UT on 2020 September 07. There will thus be no XRT or UVOT data for this trigger before this time. Burst Advocate for this burst is M. G. Bernardini (grazia.bernardini AT brera.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/)