{
  "bibcode": "2020GCN.28350....1B",
  "body": "A. P. Beardmore (U Leicester), J.D. Gropp (PSU),\nA. Y. Lien (GSFC/UMBC), M. J. Moss (GWU), K. L. Page (U Leicester) and\nD. M. Palmer (LANL) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 00:44:22 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 200903A (trigger=994389).  Swift did not slew immediately \ndue to an observing constraint. \nThe BAT on-board calculated location is \nRA, Dec 164.311, +50.501 which is \n   RA(J2000) = 10h 57m 15s\n   Dec(J2000) = +50d 30' 02\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a multi-peaked\nstructure with a duration of about 30 sec. The peak count rate\nwas ~5000 counts/sec (15-350 keV), at ~0 sec after the trigger. \n\nDue to a Sun observing constraint, Swift cannot slew to the BAT\nposition until 14:33 UT on 2020 September 12. There will thus be no XRT\nor UVOT data for this trigger before this time. \n\nBurst Advocate for this burst is A. P. Beardmore (apb AT star.le.ac.uk). \nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/)",
  "circularId": 28350,
  "createdOn": 1599095171000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 200903A: Swift detection of a burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 200903A"
}