TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4706 SUBJECT: GRB 060206: optical observations at Asiago DATE: 06/02/07 17:08:28 GMT FROM: Daniele Malesani at SISSA-ISAS,Trieste,Italy D. Malesani (SISSA), H. Navasardyan (INAF/OApD), S. Piranomonte (INAF/OAR), N. Masetti (INAF/IASF Bo), report on behalf of a larger Italian collaboration: We observed the afterglow of GRB 060206 (Morris et al., GCN 4682, 4689; Fynbo et al., GCN 4683) with the AFOSC instrument at the Asiago observatory (Northern Italy). The observing conditions were awful (seeing of ~3.3"). Photometry was carried out in the R- and i- filters. Despite the bad sky conditions, the object was well detected in both filters (S/N~20). In particular, we find R = 19.65 +- 0.20 in comparison with several USNO-B1 stars (R1 magnitude). The error is mostly due to calibration. The mean time of the R-band observations (lasting 1 hr overall) is 2005 Feb 7.0037 (0.80 d after the GRB). This message may be cited.