TITLE: GCN CIRCULAR NUMBER: 9255 SUBJECT: GRB 090426: TNT confimation of optical counterpart DATE: 09/04/26 13:32:17 GMT FROM: W.K. Zheng at NAOC L.P. Xin, W.K. Zheng, Y.L. Qiu, J.Y. Wei, j. Wang, J.S. Deng, Y. Urata and J.Y. Hu on behalf of EAFON report: TNT quickly responsed to the GRB 090426 (Swift trigger 350479; Cummings et al. GCN 9254) in automatical mode, the first images was taken start 12:50:03 (UT), 76s after the burst. We detect a fading source at the position consistent with the UVOT coordinate (Cummings et al. GCN 9254) thus confirmed the OT of burst GRB 090426. The brightness in white band is ~16.4 at 76s after the burst calibrated with USNO A-2.0 R band. Observation is still under going. Spectral observation is encouraged. This message may be cited. [GCN OPS NOTE(26apr09): Per author's request, the word "short" was removed removed from the second sentence.]