Special configuration of a very large Schmidt telescope for extensive astronomical spectroscopic observation
Shouguan WangBeijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100080,
ChinaDing-qiang SuNanjing Astronomical Instruments Research Center, Chinese Academy of Sciences, Nanjing 210042,
ChinaYaoquan ChuCenter for Astrophysics, University of Science and Technology of China, Hefei 230026,
ChinaXiangqun CuiNanjing Astronomical Instruments Research Center, Chinese Academy of Sciences, Nanjing 210042,
ChinaYanan WangNanjing Astronomical Instruments Research Center, Chinese Academy of Sciences, Nanjing 210042,
China
1996en
ABI
Аннотация
A special reflecting Schmidt telescope is used to observe celestial objects. The telescope has an aperture of 4m, f ratio of 5, and a 5° field of view. Its optical axis is fixed and tilted 25° to the horizontal that runs from south to north. The celestial objects were observed for 1.5 h as they passed through the meridian. The shape of the reflecting Schmidt plate has to be changed with each different declination δ and in the tracking process. This is achieved with active optics. The sky area to be observed is -10° ≤ δ ≤ +90°. There are plans to place ~4000 optical fibers on the telescope focal surface that will lead to a dozen spectrographs.
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