{
  "bibcode": "2005GCN..4205....1P",
  "body": "K.L. Page, M.R. Goad (U. Leicester), D.N. Burrows, J. Racusin (PSU), S.\nOates (MSSL), M. Ajello (MPE) and M. Trippico (GSFC-SSAI) report on behalf\nof the Swift XRT team:\n\nWe have analysed 38 ks of XRT observations of the HETE burst GRB051028\n(trigger number H3951; GCN 4172, Hurley et al.), between approximately 7.1\nand 178 hours after the trigger. As reported in GCN 4174 (Racusin et al.),\nthere is an uncatalogued, fading X-ray source within the HETE error\ncircle. The refined coordinates for this X-ray afterglow are:\n\nRA(J2000):   01 48 15.1\nDec(J2000): +47 45 12.9\n\nwith an estimated uncertainty of 3.8 arcsec (90% containment) and\nincluding the latest XRT boresight correction. The position is 0.6 arcsec\nfrom that given by Racusin et al. (GCN 4174) and 3.9 arcsec from the\noptical afterglow detected by the WHT (GCNs 4175, Jelinek et al., and\n4176, Pandey et al.)\n\nThe X-ray light-curve shows a simple power-law decay with a slope of 1.25\n+0.25/-0.16.  The spectrum of the full 38 ks of data can also be modelled\nwith a power-law, with photon index, Gamma = 1.74 +/- 0.21. There is no\nevidence for an absorbing column higher than the Galactic value of 1.2e21\ncm^-2.\n\nAt 7.1 hours, the 0.3-10 keV observed (unabsorbed) flux was ~1.8e-12\n(2.2e-12) erg cm^-2 s^-1. At 178 hours, the afterglow had faded to an\nobserved (unabsorbed) flux level of 2.3e-14 (2.8e-14) erg cm^-2 s^-1.",
  "circularId": 4205,
  "createdOn": 1131365035000,
  "email": "kpa@star.le.ac.uk",
  "subject": "GRB051028: Swift-XRT refined analysis",
  "submitter": "Kim Page at U.of Leicester  <kpa@star.le.ac.uk>",
  "eventId": "GRB 051028"
}