GCN Circular 6234
GRB 070330: Swift-XRT refined analysis D. Grupe (PSU) reports on behalf of the Swift/XRT team We have analyzed the first two orbits of GRB 070330 (Grupe et al., GCN 6232) with total observing times of 2.7 ks in photon counting mode in the Swift XRT. The Photon Counting mode image provides a refined XRT position at Ra, Dec= 269.5407, -63.7934, which is RA(J2000) = 17h 58m 09.8s Dec(J2000) = -63d 47' 36.1" with an error of 3.6" (90% confidence). This position is 0.4" away from the preliminary XRT position reported in GCN 6232. The X-ray light curve displays a flare at the beginning of the XRT observation with a peak at about 230s after the burst. The decay slope after the flare is 1.10+/-0.12. The prediction 24h after the burst is a 0.3-10.0 keV flux of 6e-14 ergs/s/cm2 or about 1.3e-3 XRT counts/s. The photon counting mode data can be fitted by a single absorbed power law model with a photon index Gamma=1.72+/-0.11 and an absorption column density consistent with the Galactic value (7.14e20 cm^-2; Dickey & Lockman, 1990). More analysis of the data will be presented in the GCN report. This circular is an official product of the Swift XRT team.