{
  "bibcode": "2006GCN..4685....1M",
  "body": "D. Morris (PSU), D. Burrows (PSU), N. Gehrels (GSFC), F. Marshall \n(GSFC), M. Chester (PSU) on behalf of the Swift XRT team:\n\nThe Swift XRT began observing GRB 060204a, detected by INTEGRAL \n(Mereghetti et al., GCN 4654), at 00:08:02 UT on 05 February 2006 (39 ks \nafter the burst trigger). In 14.5 ks of data, we find a faint, \nuncataloged X-ray source within the 2.5 arcminute INTEGRAL error circle at:\n\nRA(J2000): 15:28:58.4\nDEC(J2000): -39:27:28.5\n\nwith an uncertainty of 5 arcsec (90% containment). This position \nincludes the latest XRT boresight correction and is 58 arcseconds from \nthe INTEGRAL reported position in GCN 4654. We calculate an average flux \nfor this source of 1e-13 ergs/cm2/s (0.2-10keV unabsorbed) assuming a \npowerlaw index of 2 and galactic absorption of 1e21 cm^-2. We note that \nthis source flux is brighter than the 3-sigma upper limit reported in \nGCN 4676 (Kong). Due to the small number of counts, we are unable to \ndetermine whether the source is fading at this time. We note, however, \nthat the detected flux is consistent with typical GRB afterglow flux \nlevels at T+100ks, which is the mean epoch of this observation. \nObservations are continuing and further analysis regarding the fading \nnature of this source will be issued as the data become available.\n\nThis circular is an officical product of the Swift XRT Team.",
  "circularId": 4685,
  "createdOn": 1139211525000,
  "email": "morris@astro.psu.edu",
  "subject": "GRB060204a: Swift XRT Detection of an Afterglow Candidate",
  "submitter": "David Morris at PSU/Swift-XRT  <morris@astro.psu.edu>",
  "eventId": "GRB 060204A"
}