GRB 050509b: possible optical counterpart. Cenko, S. B. ; Soifer, B. T. ; Bian, C. ; Desai, V. ; Kulkarni, S. R. ; Berger, E. ; Dey, A. ; Jannuzi, B. T. Abstract Publication: GRB Coordinates Network Pub Date: 2005 Bibcode: 2005GCN..3391....1C