GCN Circular 4453
K.L. Page, A.P. Beardmore, M.R. Goad, D.N. Burrows, J. Greiner (MPE) & D. Hinshaw (GSFC-SPSYS) report on behalf of the Swift-XRT Team: We have analysed the first 7 orbits of X-ray data for GRB 060108. A ~9ks PC mode image gives a refined X-ray position of: RA(J2000) = 09h 48m 01.6s Dec(J2000) = +31d 55' 04.6" with an estimated uncertainty of 3.4" (radius, 90% containment), including corrections for the XRT boresight. This is 1.9" from the XRT position given by Page et al. (GCN 4444) and 61" from the refined (ground-calculated) BAT position (Sakamoto et al.; GCN 4445). Spectra from both the first and later orbits of data are consistent with a single power-law model, with Gamma = 1.76 +/- 0.19. There is no evidence for absorption in excess of the Galactic value of 1.7e20 cm^-2. From the first orbit of PC data (107-1072 seconds after the trigger), the 0.3-10 keV observed (unabsorbed) flux was calculated to be 1.08e-11 (1.13e-11) erg cm^-2 s^-1. The PC light-curve shows some slight flaring activity, with the underlying continuum being well modelled by a broken power-law with parameters: alpha_1 = 2.2 +/- 0.5 t_break = 280+/- 64 s alpha_2 = 0.43 +/- 0.06 This predicts the observed (unabsorbed) flux at 24 hours after the burst to be 9.8e-13 (1.0e-12) erg cm^-2 s^-1.