{
  "bibcode": "2020GCN.27778....1E",
  "body": "P. A. Evans (U Leicester), J.D. Gropp (PSU),\nS. Laha (GSFC/UMBC/CRESST), A. Y. Lien (GSFC/UMBC) and\nK. L. Page (U Leicester) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 11:41:34 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 200522A (trigger=973628).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 5.667, -0.282 which is \n   RA(J2000) = 00h 22m 40s\n   Dec(J2000) = -00d 16' 53\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a single-peaked\nstructure with a duration of about 1 sec.  The peak count rate\nwas ~5000 counts/sec (15-350 keV), at ~0 sec after the trigger. \n\nThe XRT began observing the field at 11:42:57.5 UT, 83.4 seconds after\nthe BAT trigger. Using promptly downlinked data we find an uncatalogued\nX-ray source with an enhanced position: RA, Dec 5.6823, -0.2824 which\nis equivalent to:\n   RA(J2000)  = 00h 22m 43.76s\n   Dec(J2000) = -00d 16' 56.7\"\nwith an uncertainty of 3.9 arcseconds (radius, 90% containment). This\nlocation is 55 arcseconds from the BAT onboard position, within the BAT\nerror circle. This position may be improved as more data are received;\nthe latest position is available at https://www.swift.ac.uk/sper.  We\ncannot determine whether the source is fading at the present time. \n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata does not constrain the column density. \n\nNo UVOT analysis is available at this time. \n\nBurst Advocate for this burst is P. A. Evans (pae9 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": 27778,
  "createdOn": 1590148957000,
  "email": "klp5@leicester.ac.uk",
  "subject": "GRB 200522A: Swift detection of a short burst",
  "submitter": "Kim Page at U.of Leicester  <klp5@leicester.ac.uk>",
  "eventId": "GRB 200522A"
}