{
  "createdOn": 1687429532067,
  "eventId": "GRB 230622A",
  "bibcode": "2023GCN.34058....1M",
  "circularId": 34058,
  "subject": "GRB 230622A: Swift detection of a burst",
  "submitter": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
  "body": "\nA. Melandri (INAF-OAR), A. D'Ai (INAF-IASFPA), J. A. Kennea (PSU),\nK. L. Page (U Leicester) and M. H. Siegel (PSU) report on behalf of\nthe Neil Gehrels Swift Observatory Team:\n\nAt 10:04:21 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 230622A (trigger=1176135).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 292.532, -32.922 which is \n   RA(J2000) = 19h 30m 08s\n   Dec(J2000) = -32d 55' 16\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a single-peaked\nstructure with a duration of about 5 sec.  The peak count rate\nwas ~2020 counts/sec (15-350 keV), at ~0 sec after the trigger. \n\nThe XRT began observing the field at 10:10:36.3 UT, 375.1 seconds after\nthe BAT trigger. No source was detected in the 2.5-s promptly available\nimage. We are waiting for the full dataset to detect and localise the\nXRT counterpart. \n\nUVOT took a finding chart exposure of 114 seconds with the White filter\nstarting 378 seconds after the BAT trigger. No credible afterglow candidate has\nbeen found in the initial data products. The 2.7'x2.7' sub-image covers 25% of\nthe BAT error circle. The typical 3-sigma upper limit has been about 19.6 mag. \nThe 8'x8' region for the list of sources generated on-board covers 100% of the\nBAT error circle. The list of sources is typically complete to about 18 mag. No\ncorrection has been made for the expected extinction corresponding to E(B-V) of\n0.101. \n\nBurst Advocate for this burst is A. Melandri (andrea.melandri 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/)\n\n"
}