TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3517 SUBJECT: GRB 050603: Analysis of UVOT data DATE: 05/06/03 23:18:24 GMT FROM: Edo Berger at Carnegie Obs E. Berger (Carnegie Observatories) reports: "We obtained the UVOT V-band data from the Swift quick-look webpage and performed aperture photometry on the two epochs discussed in GCN 3516. We find that the afterglow faded by 1.3 mag between the two observations rather than 3.6 mag as reported in GCN 3516." This message may be cited [GCN OPS NOTE(04jun05): Per author's request, the Subject line was corrected from "050406" to "050603".]