TITLE: GCN CIRCULAR NUMBER: 5893 SUBJECT: GRB 061202: Swift XRT refined analysis DATE: 06/12/02 19:25:20 GMT FROM: Giulia Stratta at ASDC G. Stratta, M. Perri, M.L. Conciatore (ASDC), D. N. Burrows (PSU) and T. Sakamoto (NASA/ORAU) report on behalf of the Swift XRT team: We have analysed the first five orbits of Swift XRT data on the BAT GRB 061202 (Sakamoto, et al., GCN Circ. 5886; Sakamoto et al., GCN Circ. 5887). A 7.6ks photon counting mode image provides a refined XRT position: RA(J2000) = 07h 02m 05.55s Dec(J2000) = -74d 41m 54.6" with an uncertainty of 3.5" (90% containment). This is 8.6' away from the centre of the refined BAT position quoted in GCN Circ. 5887 (Sakamoto et al.), and 4.0" away from the initial XRT position quoted in GCN Circ. 5886 (Sakamoto et al.). The early X-ray light curve displays a large flare peaking at a count rate of approximately 115 counts/s at T+140s followed by a shallow phase up to about T+13ks. At later times the afterglow curve shows a decline with a power-law decay with index alpha=-1.6+/-0.4. The X-ray spectrum covering the time period from T+126s to T+310s is well fit by an absorbed power-law with a photon index of 1.9+/-0.1 and column density of (6.0+/-0.5)e21 cm**-2 (errors are at 90% confidence level). We note the Galactic column density in the direction of the source is 1.16e21 cm**-2. The observed (unabsorbed) 0.3-10 keV flux for this spectrum is 1.5e-09 (2.5e-09) erg/cm**2/s. Assuming the X-ray emission continues to decline at the same rate, we predict a 0.3-10 keV XRT count rate of 0.02 count/s at T+24hr, which corresponds to an observed (unabsorbed) 0.3-10 keV flux of 1.2e-12 (2.0e-12) erg/cm**2/s. This circular is an official product of the Swift XRT Team.