GRB 091020: NOT spectroscopic redshift. Xu, D. ; Fynbo, J. P. U. ; Tanvir, N. R. ; Hjorth, J. ; Leloudas, G. ; Malesani, D. ; Jakobsson, P. ; Wilson, P. A. ; Andersen, J. Abstract Publication: GRB Coordinates Network Pub Date: 2009 Bibcode: 2009GCN.10053....1X