GRB060502b: optical observations. Rumyantsev, V. ; Karimov, R. ; Salyamov, R. ; Pavlenko, E. ; Efimov, Y. ; Pozanenko, A. ; Ibrahimov, M. Abstract Publication: GRB Coordinates Network Pub Date: 2006 Bibcode: 2006GCN..5184....1R