{
  "bibcode": "2013GCN.15071....1G",
  "body": "B.P. Gompertz (U Leicester), D. N. Burrows (PSU),\nN. Gehrels (NASA/GSFC), J. A. Kennea (PSU),\nH. A. Krimm (CRESST/GSFC/USRA), F. E. Marshall (NASA/GSFC),\nC. J. Mountford (U Leicester), K. L. Page (U Leicester),\nD. M. Palmer (LANL), M. H. Siegel (PSU), M. Stamatikos (OSU/NASA/GSFC)\nand C. A. Swenson (PSU) report on behalf of the Swift Team:\n\nAt 02:51:33 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 130806A (trigger=565562).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 35.872, +67.530 which is \n   RA(J2000) = 02h 23m 29s\n   Dec(J2000) = +67d 31' 48\"\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 10 sec.  The peak count rate\nwas ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger. \n\nThe XRT began observing the field at 02:52:40.2 UT, 66.2 seconds after\nthe BAT trigger. Using promptly downlinked data we find a possible\nX-ray source located at RA, Dec 35.92827, 67.53242 which is equivalent\nto:\n   RA(J2000)  = 02h 23m 42.8s\n   Dec(J2000) = 67d 31' 56.7\"\nwith an uncertainty of 9.0 arcseconds (radius, 90% containment). This\nlocation is 78 arcseconds from the BAT onboard position, within the\nBAT error circle. We cannot determine whether the source is\nfading at the present time. \n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 68 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\n1.19. \n\nBurst Advocate for this burst is B.P. Gompertz (bpg6 AT le.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/too.html.)",
  "circularId": 15071,
  "createdOn": 1375758515000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 130806A: Swift detection of a burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 130806A"
}