Mini-Volume: LAMOST Experiment for Galactic Understanding and Exploration

The LEGUE input catalog for dark night observing in the LAMOST pilot survey

Fan Yang, Jeffrey L. Carlin, Chao Liu, Yue-Yang Zhang, Shuang Gao, Yan Xu, Li-Cai Deng, Heidi Jo Newberg, Sébastien Lépine, Jin-Liang Hou, Xiao-Wei Liu, Norbert Christlieb, Hao-Tong Zhang, Hsu-Tai Lee, Kai-Ke Pan, Zhan-Wen Han, Hong-Chi Wang


Abstract We outline the design of the dark nights portion of the LAMOST Pilot Survey, which began observations in 2011 October. In particular, we focus on Milky Way stellar candidates that are targeted for the LEGUE (LAMOST Experiment for Galactic Understanding and Exploration) survey. We discuss the regions of sky in which spectroscopic candidates were selected, and the motivations for selecting each of these sky areas. Some limitations due to the unique design of the telescope are discussed, including the requirement that a bright (V < 8) star be placed at the center of each plate for wavefront sensing and active optics corrections. The target selection categories and scientific goals motivating them are briefly discussed, followed by a detailed overview of how these selection functions were implemented. We illustrate the difference between the overall input catalog – Sloan Digital Sky Survey (SDSS) photometry – and the final targets selected for LAMOST observations.


Keywords surveys: LAMOST — Galaxy: halo — techniques: spectroscopic

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