{
  "bibcode": "2020GCN.28406....1M",
  "body": "A. Melandri (INAF-OAB), M. G. Bernardini (INAF-OAB),\nJ. A. Kennea (PSU), N. J. Klingler (PSU), N. P. M. Kuin (UCL-MSSL),\nK. L. Page (U Leicester), D. M. Palmer (LANL) and\nT. Sbarrato (INAF-OAB) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 23:17:10 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 200909B (trigger=995288).  Swift did not slew to the\nlocation due to an observing constraint. \nThe BAT on-board calculated location is \nRA, Dec 175.176, -31.179 which is \n   RA(J2000) = 11h 40m 42s\n   Dec(J2000) = -31d 10' 43\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a single complex peak\nstructure with a duration of about 40 sec.  The peak count rate\nwas ~1500 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 03:23 UT on 2020 November 09. There will thus be no XRT\nor UVOT data for this trigger before this time. \n\nBurst Advocate for this burst is A. Melandri (andrea.melandri AT brera.inaf.it). \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": 28406,
  "createdOn": 1599694010000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 200909B: Swift detection of a burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 200909B"
}