{
  "bibcode": "2006GCN..4651....1M",
  "body": "D. Morris (PSU), D. Burrows (PSU), N. Gehrels (GSFC), P. Boyd \n(GSFC-UMBC), W. Voges (MPE) report on behalf of the Swift XRT team:\n\nWe have analyzed the Swift XRT data from the first two orbits of GRB \n060203 (Retter et al., GCN4641), with a total exposure of 5000 seconds. \nThe refined XRT position is:\n\nRA(J2000) = 06h 54m 04.35s\nDec(J2000) = +71d 48' 38.4\"\n\nThis position is 44.6 arcseconds from the BAT position, 2.5 arcseconds \nfrom the XRT position given in GCN4644 and 2.4 arcseconds from the \noptical counterpart position given in GCN4645 (Malesani et al). We \nestimate an uncertainty of 4 arcseconds radius (90% containment).\n\nThe 0.2-10 keV light curve in Photon Counting (PC) mode starts 3100 \nseconds from the BAT trigger (T0).  The lightcurve shows evidence of a \nshallow decay index of 0.6.\n\nA preliminary spectral fit to the PC data gives a spectral power law \nphoton index of 2.24 � 0.3 in the 0.2-10 keV band with NH of 1.9e21 � \n7e20, above the galactic NH value for this direction of 6e20. The \nunabsorbed 0.2-10 keV flux at the start of the XRT observation is \nestimated to be about 1E-11 erg/cm2/s. If the current decay slope \ncontinues, we predict an unabsorbed 0.2-10 keV flux of about 1e-12 \nerg/cm2/s at T+24hrs.",
  "circularId": 4651,
  "createdOn": 1139038429000,
  "email": "morris@astro.psu.edu",
  "subject": "GRB060203: Swift XRT Team Refined Analysis",
  "submitter": "David Morris at PSU/Swift-XRT  <morris@astro.psu.edu>",
  "eventId": "GRB 060203"
}