GRBs Optical follow - up observation at Lulin observatory , Taiwan ( ∗ )

— The Lulin GRB program, using the Lulin One-meter Telescope (LOT) in Taiwan started in July 2003. Its scientific aims are to discover optical counterparts of XRFs and short and long GRBs, then to quickly observe them in multiple bands. Thirteen follow-up observations were provided by LOT between July 2003 and Feb. 2005. One host galaxy was found at GRB 031203. Two optical afterglows were detected for GRB 040924 and GRB 041006. In addition, the optical observations of GRB 031203 and a discussion of the non-detection of the optical afterglow of GRB 031203 are also reported in this article. PACS 95.55.Cs – Ground-based ultraviolet, optical and infrared telescopes. PACS 98.70.Rz – gamma-ray source; gamma-ray bursts. A parallel effort based on the Kiso GRB optical observation system [1, 2], was started in July 2003 using the Lulin One-meter Telescope (LOT) at Taiwan. The scientific aims of our Lulin GRB program are: (1) to discover optical counterparts of XRFs, and short-and long-duration GRBs; (2) to perform multi-band observations that will unlock the temporal and spectral evolution of the corresponding optical afterglows.