GRB 130831A : Xinglong 60cm optical observation. Xin, L. P. ; Han, X. H. ; Qiu, Y. L. ; Wei, J. Y. ; Wang, J. ; Deng, J. S. ; Wu, C. Abstract Publication: GRB Coordinates Network Pub Date: 2013 Bibcode: 2013GCN.15146....1X