{
  "bibcode": "2011GCN.12650....1S",
  "body": "M. H. Siegel (PSU), S. D. Barthelmy (GSFC),\nA. P. Beardmore (U Leicester), D. N. Burrows (PSU), V. D'Elia (ASDC),\nP. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),\nC. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC),\nJ. A. Kennea (PSU), A. Y. Lien (NASA/GSFC/ORAU),\nC. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC),\nA. Melandri (INAF-OAB), P. T. O'Brien (U Leicester),\nD. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU),\nE. Troja (NASA/GSFC/ORAU) and B.-B. Zhang (PSU) report on behalf of\nthe Swift Team:\n\nAt 14:37:03 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 111210A (trigger=509419).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 191.488, -7.167 which is \n   RA(J2000) = 12h 45m 57s\n   Dec(J2000) = -07d 10' 01\"\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 2.5 sec.  The peak count rate\nwas ~6000 counts/sec (15-350 keV), at ~0 sec after the trigger. \n\nThe XRT began observing the field at 14:38:04.0 UT, 60.8 seconds after\nthe BAT trigger. Using promptly downlinked data we find an uncatalogued\nX-ray source located at RA, Dec 191.47507, -7.16565 which is equivalent\nto:\n   RA(J2000)  = 12h 45m 54.02s\n   Dec(J2000) = -07d 09' 56.3\"\nwith an uncertainty of 3.8 arcseconds (radius, 90% containment). This\nlocation is 46 arcseconds from the BAT onboard position, within the BAT\nerror circle. This position may be improved as more data are received;\nthe latest position is available at http://www.swift.ac.uk/sper.  We\ncannot determine whether the source is fading at the present time. \n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density consistent with the Galactic value of 1.92\nx 10^20 cm^-2 (Kalberla et al. 2005). \n\nUVOT took a finding chart exposure of 150 seconds with the White\nfilter  starting 64 seconds after the BAT trigger. No credible\nafterglow candidate has  been found in the initial data products.  The\n2.7'x2.7' sub-image covers 100% of  the XRT error circle. The typical\n3-sigma upper limit has been about 19.6 mag. No correction has been\nmade for the expected extinction corresponding to E(B-V) of 0.03. \n\nBurst Advocate for this burst is M. H. Siegel (siegel 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": 12650,
  "createdOn": 1323528573000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 111210A: Swift detection of a burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 111210A"
}