GRB 110731A: NOT photometry. Malesani, D. ; Leloudas, G. ; Xu, D. ; de Ugarte Postigo, A. ; Hjorth, J. ; Jakobsson, P. ; Nielsen, M. B. Abstract Publication: GRB Coordinates Network Pub Date: 2011 Bibcode: 2011GCN.12220....1M