GRB 131004A: optical afterglow from the NOT. Xu, D. ; Malesani, D. ; Hjorth, J. ; Jakobsson, P. ; Kruehler, T. ; Santiago, E. ; Groeneboom, N. ; Hafreager, A. Abstract Publication: GRB Coordinates Network Pub Date: 2013 Bibcode: 2013GCN.15304....1X