{
  "bibcode": "2010GCN.11331....1C",
  "body": "J. K. Cannizzo (NASA/UMBC), S. D. Barthelmy (GSFC),\nW. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),\nD. N. Burrows (PSU), M. M. Chester (PSU), N. Gehrels (NASA/GSFC),\nJ. M. Gelbord (PSU), S. T. Holland (CRESST/USRA/GSFC),\nJ. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL),\nV. Mangano (INAF-IASFPA), K. L. Page (U Leicester),\nD. M. Palmer (LANL), J. L. Racusin (NASA/GSFC),\nA. Rowlinson (U Leicester), T. Sakamoto (NASA/UMBC),\nB. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU),\nM. Stamatikos (OSU/NASA/GSFC) and E. Troja (NASA/GSFC/ORAU) report on\nbehalf of the Swift Team:\n\nAt 16:58:35 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 101011A (trigger=436094).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 48.298, -65.986, which is \n   RA(J2000)  =  03h 13m 12s\n   Dec(J2000) = -65d 59' 08\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve shows about 5 peaks\nwith a duration of about 50 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 16:59:53.5 UT, 78.2 seconds after\nthe BAT trigger. Using promptly downlinked data we find a bright,\nfading, uncatalogued X-ray source located at RA, Dec 48.29427,\n-65.98212 which is equivalent to:\n   RA(J2000)  = 03h 13m 10.62s\n   Dec(J2000) = -65d 58' 55.6\"\nwith an uncertainty of 3.8 arcseconds (radius, 90% containment). This\nlocation is 14 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. \n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density in excess of the Galactic value (3.27 x\n10^20 cm^-2, Kalberla et al. 2005), with an excess column of 4.4\n(+3.08/-2.53) x 10^21 cm^-2 (90% confidence). \n\nThe initial flux in the 2.5 s image was 6.35e-10 erg cm^-2 s^-1 (0.2-10\nkeV). \n\nUVOT took a finding chart exposure of 150 seconds with the White\nfilter  starting 84 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.   The 8'x8' region for\nthe list of sources generated on-board covers 100% of the  XRT error\ncircle. The list of sources is typically complete to about 18 mag. No \ncorrection has been made for the expected extinction corresponding to\nE(B-V) of 0.03. \n\nBurst Advocate for this burst is J. K. Cannizzo (cannizzo AT milkyway.gsfc.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": 11331,
  "createdOn": 1286817103000,
  "email": "scott@milkyway.gsfc.nasa.gov",
  "subject": "GRB 101011A: Swift detection of a burst",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 101011A"
}