TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5074 SUBJECT: GRB 060502B: optical observations DATE: 06/05/05 09:03:29 GMT FROM: Daniele Malesani at SISSA-ISAS,Trieste,Italy E.J.A. Meurs, S.D. Vergani, C. O'Maoileidigh (Dunsink Observatory), D. Malesani (SISSA), and R. Gualandi (Loiano Observatory), report: We observed the field of the short GRB 060502B (Troja et al. 2006, GCN 5055) with the 152 Cassini telescope located in Loiano, Italy, equipped with BFOSC. Observations were conducted under moderate weather conditions (passing cirrus), securing three 20-min exposures. The mean time was May 2.96198 UT (5.68 hr after the burst). The average seeing was 1.8". No source was detected inside the revised XRT error circle (Troja et al. 2006, GCN 5063) in the coadded frame. The limiting magnitude is R = 20.6 (3 sigma) based on the USNO catalog. This message can be cited.