{
  "bibcode": "2006GCN..4481....1G",
  "body": "M.R. Goad, A.P. Beardmore, K. Page (U. Leicester), D. Burrows (PSU), R. Fink\n(GSFC), M. Ajello (MPE) report on behalf of the Swift XRT team.\n\nFrom analysis of 2.5 ks of Photon Counting mode data of GRB060111 (Zane et\nal., GCN 4479) starting in the 2nd orbit of observations, we obtain a refined\nXRT position of RA: 18h 24m 49.0s, Dec:+37d 36m 16.1s (J2000) with an\nuncertainty of 3.6 arcsec (90% containment). This includes the latest XRT\nboresight correction. This refined position is 25.1 arcsec from the BAT\non-board position and 5 arcsec from the XRT on-board position quoted in GCN\n4479.\n\nWe have also analysed 400 s of XRT Windowed Timing mode observations starting\n78 s after the BAT trigger. The XRT lightcurve displays 3 large flares with a\npeak count rate of approximately 150 ct/s occurring 280 s after the BAT\ntrigger. The light-curve has an underlying powerlaw decay of slope -1.3.\n\nThe XRT WT mode 0.3-10 keV spectrum is well represented by an absorbed\npowerlaw with photon index 2.35 +/-0.04 with a mean unabsorbed flux of 2.5e-9\nergs/cm2/s. We find evidence for excess NH of 2.4e21 cm^-2.\n\nThe predicted 0.3-10 keV unabsorbed flux 24 hours after the BAT trigger is\n1.2e-13 ergs/cm2/s",
  "circularId": 4481,
  "createdOn": 1136985782000,
  "email": "mrg@star.le.ac.uk",
  "subject": "GRB060111 : XRT refined analysis",
  "submitter": "Michael Goad at U Leicester  <mrg@star.le.ac.uk>",
  "eventId": "GRB 060111"
}