{
  "bibcode": "2021GCN.29886....1T",
  "body": "E. Troja (NASA/GSFC/UMCP), C. Gronwall (PSU), A. Y. Lien (GSFC/UMBC)\nand A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels\nSwift Observatory Team:\n\nAt 17:47:10 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 210422A (trigger=1044678). Due to an observing constraint,\nSwift did not slew immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 21.139, +42.110 which is \n   RA(J2000) = 01h 24m 33s\n   Dec(J2000) = +42d 06' 36\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, \nincluding systematic uncertainty). The BAT light curve showed a \nsingle pulse structure with a duration of about 5 sec.  \nThe peak count rate was ~1000 counts/sec (15-350 keV), \nat ~0 sec after the trigger. \n\nDue to a Sun observing constraint, Swift cannot slew to the BAT \nposition until 2021 June 4. There will thus be no XRT or UVOT data\nfor 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/)",
  "circularId": 29886,
  "createdOn": 1619132873000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 210422A: Swift detection of a burst",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 210422A"
}