{
  "bibcode": "2006GCN..5139....1P",
  "body": "K.L. Page, J.P. Osborne (U. Leicester), J.A. Kennea, A. Cucchiara (PSU) &\nJ.R. Cummings (NASA/ORAU) report on behalf of the Swift/XRT team:\n\nWe have analysed the first 4 orbits of Swift/XRT data of GRB 060515\n(trigger number 210084; Cummings et al., GCN 5132), which equates to 9.6\nks between 3.4 ks and 23.2 ks after the trigger.\n\nThe source tentatively identified by Page & Kennea in GCN 5137 is found to\nbe fading, and so is the best candidate for the afterglow. The refined\nposition is:\n\nRA(J2000)  =  08 29 09.5 \nDec(J2000) = +73 34 02.82\n\nwith an estimated uncertainty of 4.5 arcsec (90% uncertainty). This is 1.3\narcsec from the preliminary XRT given in GCN 5137, but 68.3 arcsec from\nthe possible optical candidate suggested by TAROT (GCN 5314, Klotz et\nal.).\n\nThe source is only detected in the first 2 individual orbits of data,\ngiving a decay slope of alpha = 1.2 +/- 0.6. However, between the 2nd and\n3rd orbits, the slope must steepen, since the 3-sigma upper limit on the\ncount rate (1.4e-3 count s^-1) is well below the extrapolation of alpha =\n1.2. Thus, we cannot sensibly predict the flux at 24 hours. However,\nbetween 3.4 ks - 5.9 ks, the 0.3-10 keV observed (unabsorbed) flux was\n1.45e-12 (1.51e-12) erg cm^-2 s^-1.\n\nThis circular is an official product of the Swift/XRT team.",
  "circularId": 5139,
  "createdOn": 1147701058000,
  "email": "kpa@star.le.ac.uk",
  "subject": "GRB 060515: Swift/XRT Team refined analysis",
  "submitter": "Kim Page at U.of Leicester  <kpa@star.le.ac.uk>",
  "eventId": "GRB 060515"
}