GCN Circular 4176
S.B.Pandey, M. Jelinek, S.S.Guziy, A.J.Castro-Tirado, J. Gorosabel, A. de Ugarte Postigo, and S. Vitek (IAA CSIC Granada, Spain) and J.T.A. De Jong, (Max Planck Intitut fuer Astronomie, Heidelberg, Germany) report: Further monitoring of the afterglow candidate (Jelinek et al. 7145) using 4.2 meter William Herschel Telescope confirms the decay nature of the source, suggesting the source is really the optical afterglow of GRB 051028. Our observation 15 h after the burst show that the OT magnitude has decayed considerably and it is around 23 in R band. We have posted the searchmap to the following website: http://lascaux.asu.cas.cz/mates/grb051028.gif This message may be cited.