GRB 121027A - Gemini south spectroscopy. Tanvir, N. R. ; Wiersema, K. ; Levan, A. J. ; Starling, R. L. C. ; Margheim, S. ; Hayward, T. Abstract Publication: GRB Coordinates Network Pub Date: 2012 Bibcode: 2012GCN.13929....1T