GRB 111228A: Xinglong TNT confirms the optical afterglow. Xin, L. P. ; Li, J. Z. ; Wei, J. Y. ; Qiu, Y. L. ; Wang, J. ; Deng, J. S. ; Wu, C. ; Han, X. H. Abstract Publication: GRB Coordinates Network Pub Date: 2011 Bibcode: 2011GCN.12738....1X