GRB 120422A: additional Gemini observations and Keck/LRIS spectroscopy. Perley, D. A. ; Cucchiara, A. ; Cenko, S. B. ; Levan, A. J. ; Kulkarni, S. R. ; Ben-Ami, S. ; Cao, Y. Abstract Publication: GRB Coordinates Network Pub Date: 2012 Bibcode: 2012GCN.13267....1P