{
  "bibcode": "2005GCN..3983....1G",
  "body": "D. Grupe, J. Kennea, D. Burrows (PSU), and N. Gehrels GSFC) on report\nbehalf of the Swift XRT team:\n\nWe have analyzed the Swift XRT data of the first three orbits of  GRB050915\n(Grupe et al. GCN 3977, BAT trigger 155242). The new refined position  \nbased\non the SDC quicklook data is:\n\nRA (J2000) =  05h26m44.6s\nDEC(J2000) = -28d01m01.0s\n\nThis position is 5.8 arcsec away from the XRT position reported by  \nKennea et al.\n(GCN 3979) based on the preliminary data analysis and 29 arcsec from the\nrefined BAT position (Barthelmy et al., GCN 3982).\n\nThe WT data show a spectrum that can be fitted by a single power law  \nwith excess\nabsorption above the Galactic value. The X-ray energy spectral slope  is \nbeta-x =\n1.33+/-0.23. The integrated 0.3-10.0 keV Flux during the WT  observation \nwas\n4.6e-10 ergs/s/cm2 (corrected for absorption).\n\nThe XRT light curve started 87s after the burst and shows a rapidly  \ndecaying\nsource after a light increased in flux at the beginning. The decay  \nslope is\nalpha-1 = 3.00+/-0.14. The light curves shows a clear break in the PC  \nmode data\nat 210s after the burst and flattens to a decay slope alpha-2=0.75 �0.04.\nExtrapolating this light curve we estimate the 0.3-10.0 flux to be in  \nthe order\nof 5e-13 ergs/s/cm2 24 hours after the burst. However, this estimate  \ndoes not\ntake any late time break, which are usually observed in GRBs several  \nhours after\nthe burst, into consideration.",
  "circularId": 3983,
  "createdOn": 1126808054000,
  "email": "grupe@astro.psu.edu",
  "subject": "GRB 050915: Swift XRT refined analysis",
  "submitter": "Dirk Grupe at PSU/Swift-XRT  <grupe@astro.psu.edu>",
  "eventId": "GRB 050915"
}