GCN Circular 12080
B. Sbarufatti (INAF-OAB/IASFPA), J. Cummings (GSFC/UMBC), report on behalf of the Swift Team. Swift-XRT performed further observations on the afterglow candidate announced in Sbarufatti et al. (GCN 12067). The source has faded with respect to the initial observation (1.2E-2 counts/s), and has dropped below the threshold for detection. The latest observations contain a 20 ks exposure, corresponding to a 3-sigma upper limit of 1.3E-3 counts/s, confirming that the source was X-ray the afterglow of GRB 110604A. This circular is an official product of the Swift-XRT team.