GRB 130427B: tentative VLT/X-shooter redshift. Flores, H. ; Covino, S. ; de Ugarte Postigo, A. ; Fynbo, J. ; Kruehler, T. ; Xu, D. ; Tanvir, N. Abstract Publication: GRB Coordinates Network Pub Date: 2013 Bibcode: 2013GCN.14493....1F