GRB090417B: Xinglong TNT optical upper limit. Xin, L. P. ; Wang, X. F. ; Zheng, W. K. ; Qiu, Y. L. ; Wei, J. Y. ; Wang, J. ; Deng, J. S. ; Urata, Y. ; Hu, J. Y. Abstract Publication: GRB Coordinates Network Pub Date: 2009 Bibcode: 2009GCN..9142....1X