{
  "bibcode": "2016GCN.19830....1S",
  "body": "M. H. Siegel (PSU), S. D. Barthelmy (GSFC), A. Y. Lien (GSFC/UMBC),\nD. Malesani (DARK/NBI), K. L. Page (U Leicester) and D. M. Palmer (LANL)\nreport on behalf of the Swift Team:\n\nAt 20:34:30 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 160821A (trigger=709351).  Swift did not slew due to\nSun observing constraint.  The BAT on-board calculated location is \nRA, Dec 171.248, +42.343, which is \n   RA(J2000)  =  11h 24m 59s\n   Dec(J2000) = +42d 20' 35\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve shows several small peaks and then\na large peak at ~T+130 sec with a total duration of at least 160 sec. \nThe peak count rate was ~24,000 counts/sec (15-350 keV), at ~138 sec after the trigger. \n\nDue to a Sun observing constraint, Swift cannot slew to the BAT\nposition until 10:53 UT on 2016 September 29. There will thus be no XRT\nor UVOT data for this trigger before this time. \n\nBurst Advocate for this burst is M. H. Siegel (siegel AT swift.psu.edu). \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.)\n\n[GCN OPS NOTE(21aug16): Per SDB, DM was added to the author list.]",
  "circularId": 19830,
  "createdOn": 1471812320000,
  "email": "scott@milkyway.gsfc.nasa.gov",
  "subject": "GRB 160821A: Swift detection of a bright burst",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 160821A"
}