TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4122 SUBJECT: GRB 051021: Optical observations DATE: 05/10/21 18:04:54 GMT FROM: Sergei Guziy at IAA P. Tristram (Univ. of Canterbury, New Zealand),S. Guziy, A. de Ugarte Postigo, Shashi. B. Pandey, A. J. Castro-Tirado, M. Jelinek, J. Gorosabel (IAA-CSIC, Granada, Spain), and Ph. Yock (Univ. of Auckland, New Zealand) report: "We have observed the region centered around the HETE error box for GRB 051021 (Yoshida et al.2005, GCN 4116) with 0.6 m telescope at Mount John observatory (New Zealand), starting on October 21 ( 14:10 UT, 45 minutes after the GRB). We confirm the optical candidate reported by Fox et al. (GCN, 4120)." Further observations are in progress. This massage can be cited.