{
  "bibcode": "2005GCN..4151....1R",
  "body": "J. Racusin, D. Fox, D. Burrows (PSU), N. Gehrels (GSFC) on behalf of the \nSwift XRT team:\n\nWe have analyzed the first four orbits of data after XRT began observing \nthe field of GRB051021A (Yoshida et al., GCN 4116) at 16:28:28 UT.  The \nrefined XRT coordinates are:\n\nRA(J2000): 01 56 36.5\nDec(J2000): +09 04 6.1\n\nwith an estimated uncertainty of 4 arcseconds (90% containment), including \ncorrections for the XRT boresight offset.  This position is 1 arcsecond \nfrom the position we quoted in Racusin et al. (GCN 4125), and 2.9 \narcseconds from the optical afterglow candidate reported by Fox et al. \n(GCN 4120).\n\nThe XRT light curve shows a steady decline with a power-law fit decay \nindex of 1.06+/-0.16.\n\nThe Photon Counting mode spectra can be fit with an absorbed power-law \nwith a photon index of 2.17+/-0.18 and a column density of 1.4+/-0.5 E21 \ncm-2 which is in excess of the Galactic column density of 0.56E21 cm-2 in \nthis direction.  The observed 0.2-10 keV flux is 2.02E-12 ergs cm-2 s-1, \ncorresponding to an unabsorbed flux of 2.28E-12 ergs cm-2 s-1.",
  "circularId": 4151,
  "createdOn": 1130092441000,
  "email": "racusin@astro.psu.edu",
  "subject": "GRB051021A: Swift XRT refined analysis",
  "submitter": "Judith Racusin at PSU  <racusin@astro.psu.edu>",
  "eventId": "GRB 051021A"
}