GRB 050827 : OSN 1.5m optical observations. Guziy, S. ; Gorosabel, J. ; Castro-Tirado, A. J. ; Casanova, V. ; de Ugarte Postigo, A. ; Jelinek, M. Abstract Publication: GRB Coordinates Network Pub Date: 2005 Bibcode: 2005GCN..3903....1G