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A method of accurate guiding for LAMOST†

Published online by Cambridge University Press:  01 October 2007

Y. Yu ,
Z. X. Qi ,
Y. D. Mao ,
Z. H. Tang  and
M. Zhao
Y. Yu
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: yuy@shao.ac.cn
Z. X. Qi
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: yuy@shao.ac.cn Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
Y. D. Mao
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: yuy@shao.ac.cn
Z. H. Tang
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: yuy@shao.ac.cn
M. Zhao
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: yuy@shao.ac.cn
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Abstract

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The main optical instruments of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) are installed separately. Guiding is realized by adjusting the normal direction of the mirror MA. In order to keep the central star imaged on the rotation center of the fiber plug plate, the link between celestial and fiber plug plate coordinate systems has to be established. Some local parameters contain errors so that the normal direction of the MA calculated beforehand may not be accurate enough. The execution error of the telescope also drives the image of the central star to deviate from the rotation center. Therefore, in the process of observations the correction has to be calculated and applied periodically. Here we present the method of calculating the guiding parameters as well as the correction parameters for the LAMOST.

Keywords

astrometrytechniques: miscellaneous
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 136 - 137
Copyright
Copyright © International Astronomical Union 2008

References

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