{
  "bibcode": "2011GCN.12173....1S",
  "body": "T. Sakamoto (NASA/UMBC), A. P. Beardmore (U Leicester),\nJ. R. Cummings (NASA/UMBC), M. De Pasquale (UCL-MSSL),\nC. Guidorzi (U Ferrara), O. M. Littlejohns (U Leicester),\nC. B. Markwardt (NASA/GSFC), S. R. Oates (UCL-MSSL),\nC. Pagani (U Leicester), K. L. Page (U Leicester),\nD. M. Palmer (LANL), A. Rowlinson (U Leicester),\nC. J. Saxton (UCL-MSSL) and M. H. Siegel (PSU) report on behalf of the\nSwift Team:\n\nAt 06:09:11 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 110719A (trigger=457553).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 24.564, +34.572 which is \n   RA(J2000) = 01h 38m 15s\n   Dec(J2000) = +34d 34' 20\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a single noisy\nFRED structure with a duration of about 50 sec.  The peak count rate\nwas ~1000 counts/sec (15-350 keV), at ~T-1 sec after the trigger. \n\nThe XRT began observing the field at 06:11:03.1 UT, 111.3 seconds after\nthe BAT trigger. XRT found a bright, uncatalogued X-ray source located\nat RA, Dec 24.5799, +34.5869 which is equivalent to:\n   RA(J2000)  = 01h 38m 19.17s\n   Dec(J2000) = +34d 35' 12.8\"\nwith an uncertainty of 5.6 arcseconds (radius, 90% containment). This\nlocation is 71 arcseconds from the BAT onboard position, within the BAT\nerror circle. No event data are yet available to determine the column\ndensity using X-ray spectroscopy. \n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 121 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\n0.04. \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": 12173,
  "createdOn": 1311056534000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 110719A: Swift detection of a burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 110719A"
}