{
  "bibcode": "2011GCN.12391....1H",
  "body": "E. A. Hoversten (PSU), A. P. Beardmore (U Leicester),\nP. A. Evans (U Leicester), O. M. Littlejohns (U Leicester),\nC. Pagani (U Leicester), K. L. Page (U Leicester),\nB. Sbarufatti (INAF-OAB/IASFPA), E. Sonbas (GSFC/USRA/Adiyaman Univ.)\nand T. N. Ukwatta (MSU) report on behalf of the Swift Team:\n\nAt 09:03:20 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 110924A (trigger=503926).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 234.748, -66.308 which is \n   RA(J2000) = 15h 39m 00s\n   Dec(J2000) = -66d 18' 29\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a single peak\nstructure with a duration of about 10 sec.  The peak count rate\nwas ~1500 counts/sec (15-350 keV), at ~1 sec after the trigger. \n\nThe XRT began observing the field at 09:05:10.5 UT, 109.8 seconds after\nthe BAT trigger. No source was detected in 729 s of promptly downlinked\ndata. We are waiting for the full dataset to detect and localise the\nXRT counterpart. \n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 115 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 25% of\nthe BAT 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 69% 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\n0.16. \n\nBurst Advocate for this burst is E. A. Hoversten (hoversten 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": 12391,
  "createdOn": 1316856419000,
  "email": "hoversten@astro.psu.edu",
  "subject": "GRB 110924A: Swift detection of a possible burst",
  "submitter": "Erik Hoversten at Swift/Penn State  <hoversten@astro.psu.edu>",
  "eventId": "GRB 110924A"
}