TITLE: GCN CIRCULAR NUMBER: 24009 SUBJECT: GRB 190326A: Swift detection of a short burst DATE: 19/03/26 07:48:18 GMT FROM: Kim Page at U.of Leicester M. H. Siegel (PSU), A. Y. Lien (GSFC/UMBC), K. L. Page (U Leicester) and B. Sbarufatti (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: At 07:35:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 190326A (trigger=895006). Due to an observing constraint, Swift did not slew to the burst. The BAT on-board calculated location is RA, Dec 341.652, +39.903 which is RA(J2000) = 22h 46m 37s Dec(J2000) = +39d 54' 09" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 0.1 sec. The peak count rate was ~7000 counts/sec (15-350 keV), at ~0 sec after the trigger. Due to a Sun observing constraint, Swift cannot slew to the BAT position until 12:47 UT on 2019 April 13. There will thus be no XRT or UVOT data for this trigger before this time. Burst Advocate for this burst is M. H. Siegel (siegel AT swift.psu.edu). 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/)