GCN Circular 4928
M. Perri, L. Vetere (ASDC), D.N. Burrows (PSU) report on behalf of the Swift XRT team: The Swift XRT observed the field of GRB 060322 (GCN 4903, Perri et al.) for a second time on 2005-03-25 from 00:37:09 UT until 21:53:57 UT. We confirm that the X-ray source identified by Perri et al. (GCN 4919, RA(J2000) = 18h 16m 56.4s, Dec(J2000) = -36d 42' 31" ) has faded from view and is therefore the likely X-ray afterglow of this burst. Using an exposure of ~11 ks in Photon Counting mode we place a three sigma upper limit on the 0.3-10 keV count rate of 2.0e-3 cts/s which is significantly lower than the count rate observed with the first exposure (3.0+/-0.7)e-3 cts/s, implying that the source has faded. We conclude that the candidate reported in GCN 4919 is the X-ray afterglow of GRB 060322. This circular is an official product of the Swift XRT Team.