TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3482 SUBJECT: GRB050306: optical afterglow not confirmed DATE: 05/05/25 20:44:35 GMT FROM: Paolo D'Avanzo at INAF-OAB P. D'Avanzo, D. Fugazza, S. Covino (INAF-OABr), D. Malesani (SISSA), N. Masetti, E. Palazzi (IASF-CNR), L.A. Antonelli, G.L. Israel (INAF- OARm), report on behalf of a larger Italian collaboration: A detailed reanalysis of our images (Fugazza et al., GCN 3078; D'Avanzo et al., GCN 3089) of the field of the Swift GRB 050306 (Markwardt et al., GCN 3071; Perri et al., GCN 3075) does not allow to confirm the variability of the candidate afterglow proposed in GCN 3089. At this stage, no afterglow detection for this burst can be claimed from our observations. This message may be cited.