{
  "bibcode": "2011GCN.12158....1S",
  "body": "E. Sonbas (GSFC/USRA/Adiyaman Univ.), S. D. Barthelmy (GSFC),\nW. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),\nD. N. Burrows (PSU), V. D'Elia (ASDC), M. De Pasquale (UCL-MSSL),\nP. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),\nC. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC),\nJ. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA),\nN. P. M. Kuin (UCL-MSSL), O. M. Littlejohns (U Leicester),\nF. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),\nS. R. Oates (UCL-MSSL), C. Pagani (U Leicester),\nK. L. Page (U Leicester), P. Romano (INAF-IASFPA),\nA. Rowlinson (U Leicester), T. Sakamoto (NASA/UMBC),\nM. H. Siegel (PSU), G. Stratta (ASDC), C. A. Swenson (PSU) and\nE. Troja (NASA/GSFC/ORAU) report on behalf of the Swift Team:\n\nAt 13:13:50 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 110715A (trigger=457330).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 237.660, -46.233 which is \n   RA(J2000) = 15h 50m 38s\n   Dec(J2000) = -46d 13' 59\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a double-peaked\nstructure with a duration of about 15 sec.  The peak count rate\nwas ~70,000 counts/sec (15-350 keV), at ~2 sec after the trigger. \n\nThe XRT began observing the field at 13:15:21.9 UT, 90.9 seconds after\nthe BAT trigger. XRT found a bright, uncatalogued X-ray source located\nat RA, Dec 237.6832, -46.2326 which is equivalent to:\n   RA(J2000)  = 15h 50m 43.96s\n   Dec(J2000) = -46d 13' 57.3\"\nwith an uncertainty of 5.8 arcseconds (radius, 90% containment). This\nlocation is 57 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 99 seconds after the BAT trigger. There is a candidate afterglow in\nthe rapidly available 2.7'x2.7' sub-image at\n  RA(J2000)  =\t15:50:44.09 = 237.68370\n  DEC(J2000) = -46:14:06.5  = -46.23513\nwith a 90%-confidence error radius of about 0.62 arc sec. This position is 9.2\narc sec. from the center of the XRT error circle. The estimated magnitude is\n17.34 with a 1-sigma error of about  0.14. No correction has been made for the\nexpected extinction corresponding to E(B-V) of 0.59. \n\nBurst Advocate for this burst is E. Sonbas (eda.sonbas 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": 12158,
  "createdOn": 1310736377000,
  "email": "scott@milkyway.gsfc.nasa.gov",
  "subject": "GRB 110715A: Swift detection of a bright burst with an optical counterpart",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 110715A"
}