GCN Circular 4632
D. Morris (PSU), D. Fox (PSU), D. Burrows (PSU), N. Gehrels (GSFC), F. Marshall (GSFC), P. Boyd (GSFC-UMBC), J. Kennea (PSU), H. Krimm (GSFC/USRA), D. Palmer (LANL) report on behalf of the Swift XRT team: We have analyzed the Swift XRT data from the first orbit observation of GRB 060202 (Fox et al., GCN4629), with a total exposure of 540 seconds. The refined XRT position is: RA(J2000) = 02h 23m 23.02s Dec(J2000) = +38d 23' 05.7" This position is 82.8 arcseconds from the BAT and 3.7 arcseconds from the XRT position given in GCN 4629. We estimate an uncertainty of 4 arcseconds radius (90% containment). The 0.2-10 keV light curve in Windowed Timing (WT) mode starts 148.8 seconds from the BAT trigger (T0). The lightcurve shows a steep early decay index of 2.7 followed by a flattening to a decay index of 0.2 at T+310 s. A preliminary spectral fit to the WT data gives a spectral power law photon index of 2.52 +/- 0.03 in the [0.2-10] keV band with NH of 5.8e21 +/- 2e20, well above the galactic NH value for this direction of 5.1e20. The unabsorbed 0.2-10 keV flux at the start of the XRT observation is estimated to be about 2.5E-8 erg/cm2/s, flattening at a flux level of about 2E-9 erg/cm2/s. We do not have sufficient data at this time to allow an accurate extrapolation of the flux to T+24 hr.