{
  "bibcode": "2008GCN..8355....1G",
  "body": "D. Grupe (PSU), A. P. Beardmore (U Leicester),\nP. A. Evans (U Leicester), S. T. Holland (CRESST/USRA/GSFC),\nE. A. Hoversten (PSU), J. A. Kennea (PSU),\nC. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),\nD. M. Palmer (LANL), J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU),\nM. C. Stroh (PSU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU)\nreport on behalf of the Swift Team:\n\nAt 00:28:50 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 081011 (trigger=331332).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 220.361, +33.607 which is \n   RA(J2000) = 14h 41m 27s\n   Dec(J2000) = +33d 36' 27\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a single complex peak\nstructure with a duration of about 15 sec.  The peak count rate\nwas ~1100 counts/sec (15-350 keV), at ~0 sec after the trigger. \n\nThe XRT began observing the field at 00:30:24.4 UT, 93.9 seconds after\nthe BAT trigger. No source was detected in the promptly available XRT\ndata. This is highly unusual for a long GRB  \nwith a prompt Swift slew.  We are waiting for the full dataset \nto detect and localise the XRT counterpart. \n\n\nUVOT took a finding chart exposure of 150 seconds with the White (160-650 nm)\nfilter starting 98 seconds after the BAT trigger. No 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 18.5 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\n0.01. \n\n\n\n\nBurst Advocate for this burst is D. Grupe (grupe AT astro.psu.edu). \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": 8355,
  "createdOn": 1223686622000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 081011: Swift detection of a burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 081011"
}