GRB 171222A: Redshift from 10.4m GTC/OSIRIS. de Ugarte Postigo, A. ; Izzo, L. ; Kann, D. A. ; Thoene, C. C. ; Perley, D. A. ; Malesani, D. ; Heintz, K. E. ; Garcia, D. Abstract Publication: GRB Coordinates Network Pub Date: 2017 Bibcode: 2017GCN.22272....1D