GRB 110918A: afterglow confirmation from PTF. Cenko, S. B. ; Tanvir, N. R. ; Ofek, E. O. ; Wiersema, K. ; Levan, A. J. ; Nugent, P. E. Abstract Publication: GRB Coordinates Network Pub Date: 2011 Bibcode: 2011GCN.12367....1C