{
  "bibcode": "2020GCN.29106....1P",
  "body": "K. L. Page (U Leicester), J.D. Gropp (PSU), J. A. Kennea (PSU),\nN. J. Klingler (PSU), F. E. Marshall (NASA/GSFC), M. J. Moss (GWU) and\nA. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 18:41:33 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 201221C (trigger=1014012).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 278.205, +34.411 which is \n   RA(J2000) = 18h 32m 49s\n   Dec(J2000) = +34d 24' 39\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty). As is typical for image triggers, there is \nnothing significant in the real-time light curves. \n\nThe XRT began observing the field at 18:43:46.4 UT, 132.7 seconds after\nthe BAT trigger. No source was detected in 215 s of promptly downlinked\ndata. We are waiting for the full dataset to detect and localise the\nXRT counterpart. \n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 136 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\n0.07. \n\nBurst Advocate for this burst is K. L. Page (klp5 AT leicester.ac.uk). \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": 29106,
  "createdOn": 1608577636000,
  "email": "klp5@leicester.ac.uk",
  "subject": "Swift Trigger 1014012: possible GRB 201221C",
  "submitter": "Kim Page at U.of Leicester  <klp5@leicester.ac.uk>",
  "eventId": "GRB 201221C"
}