{
  "bibcode": "2010GCN.11448....1S",
  "body": "T. Sakamoto (NASA/UMBC), A. P. Beardmore (U Leicester),\nD. N. Burrows (PSU), S. Campana (INAF-OAB), V. D'Elia (ASDC),\nP. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),\nJ. M. Gelbord (PSU), S. T. Holland (CRESST/USRA/GSFC),\nE. A. Hoversten (PSU), N. P. M. Kuin (UCL-MSSL),\nO. M. Littlejohns (U Leicester), C. B. Markwardt (NASA/GSFC),\nP. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),\nC. Pagani (U Leicester), K. L. Page (U Leicester),\nD. M. Palmer (LANL), A. Rowlinson (U Leicester),\nB. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU),\nR. L. C. Starling (U Leicester), G. Stratta (ASDC) and\nT. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:\n\nAt 10:49:23 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 101213A (trigger=440285).  Swift slewed immediately to the burst.\nThe BAT on-board calculated location is RA, Dec 241.286,+21.915 which is \n   RA(J2000) = 16h 05m09s\n   Dec(J2000) = +21d54'53\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a FRED-like\nstructure with a duration of about 100 sec.  The peak count rate\nwas ~1700 counts/sec (15-350 keV), at ~0 sec after the trigger.\n\nThe XRT began observing the field at 10:51:08.6 UT, 105.6 seconds after\nthe BAT trigger. XRT found a bright, uncatalogued X-ray source located\nat RA, Dec 241.3139, +21.8984 which is equivalent to:\n   RA(J2000)  = 16h 05m 15.33s\n   Dec(J2000) = +21d 53' 54.2\"\nwith an uncertainty of 4.8 arcseconds (radius, 90% containment). This\nlocation is 110 arcseconds from the BAT onboard position, within the\nBAT error circle. No event data are yet available to determine the\ncolumn density using X-ray spectroscopy.\n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 114 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 100% of\nthe XRT 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\nXRT 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\n0.06.\n\nBurst Advocate for this burst is T. Sakamoto (Taka.Sakamoto 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/too.html.)",
  "circularId": 11448,
  "createdOn": 1292239096000,
  "email": "takanori.sakamoto-1@nasa.gov",
  "subject": "GRB 101213A: Swift detection of a burst",
  "submitter": "Takanori Sakamoto at NASA/GSFC  <takanori.sakamoto-1@nasa.gov>",
  "eventId": "GRB 101213A"
}