{
  "bibcode": "2021GCN.29601....1A",
  "body": "E. Ambrosi (INAF-IASFPA), S. D. Barthelmy (GSFC),\nA. D'Ai (INAF-IASFPA), V. D'Elia (SSDC), K. L. Page (U Leicester) and\nT. Sakamoto (AGU) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 09:32:14 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 210306B (trigger=1036024).  Swift did not slew to the burst\nbecause of Sun constraint.  The BAT on-board calculated location is \nRA, Dec 331.848, +10.175 which is \n   RA(J2000)  = 22h 07m 23s\n   Dec(J2000) = +10d 10' 30\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve shows a few peaks\nstructure with a duration of at least 15 sec.  The peak count rate\nwas ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger. \n\nDue to an observing constraint, Swift will not slew to this target. \nThere will be no XRT or UVOT data. \n\nBurst Advocate for this burst is E. Ambrosi (elena.ambrosi AT 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": 29601,
  "createdOn": 1615024445000,
  "email": "scott@milkyway.gsfc.nasa.gov",
  "subject": "GRB 210306B: Swift detection of a burst",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 210306B"
}