{
  "bibcode": "2017GCN.21666....1T",
  "body": "E. Troja (NASA/GSFC/UMCP), A. D'Ai (INAF-IASFPA), V. D'Elia (ASDC),\nK. L. Page (U Leicester) and A. Tohuvavohu (PSU) report on behalf of\nthe Swift Team:\n\nAt 22:16:48 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 170823A (trigger=769177).  Swift did not slew due to the Sun \nobserving constraint. The BAT on-board calculated location is \nRA, Dec 188.719, +35.582 which is \n   RA(J2000) = 12h 34m 53s\n   Dec(J2000) = +35d 34' 55\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a complex\nstructure with a duration of about 60 sec.  The peak count rate\nwas ~4900 counts/sec (15-350 keV), at ~11 sec after the trigger. \n\nDue to a Sun observing constraint, Swift cannot slew to the BAT\nposition until 18:03 UT on 2017 October 17. There will thus be no XRT\nor UVOT data for this trigger before this time. \n\nBurst Advocate for this burst is E. Troja (eleonora.troja AT nasa.gov). \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/too.html.)",
  "circularId": 21666,
  "createdOn": 1503527442000,
  "email": "klp5@leicester.ac.uk",
  "subject": "GRB 170823A: Swift detection of a burst",
  "submitter": "Kim Page at U.of Leicester  <klp5@leicester.ac.uk>",
  "eventId": "GRB 170823A"
}