The selection of LEGUE disk targets for LAMOST's pilot survey

Abstract

We describe the target selection algorithm for the low latitude disk portion of the LAMOST Pilot Survey, which aims to test systems in preparation for the LAMOST spectroscopic survey. We use the PPMXL (Roeser et al. 2010) astrometric catalog, which provides positions, proper motions, B/R/I magnitudes (mostly) from USNO-B (Monet et al. 2003) and J/H/Ks from The Two Micron All Sky Survey (2MASS, see Skrutskie et al. 2006) as well. We chose 8 plates along the Galactic plane, in the region $0^{\circ }<\alpha <67^{\circ }$ and $42^{\circ }<\delta <59^{\circ }$, that cover 22 known open clusters with a range of ages. Adjacent plates may have small overlapping. Each plate covers an area $2.5^{\circ }$ in radius,with central star (for Shack-Hartmann guider) brighter than $\sim 8^{\mathrm{th}}$ magnitude. For each plate, we create an input catalog in the magnitude range $11.3<Imag<16.3$ and $Bmag$ available from PPMXL. The stars are selected to satisfy the requirements of the fiber positioning system and have a uniform distribution in the $I$ vs. $B-I$ color-magnitude diagram. Our final input catalog consists of 12,000 objects on each of 8 plates that are observable during the winter observing season in Xinglong Station of the National Astronomical Observatory of China.

9 pages, 5 figures, accepted for publication in Research in Astronomy and Astrophysics

References in corpus (4)

• LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) The survey science plan
• An Algorithm for Preferential Selection of Spectroscopic Targets in LEGUE
• The LEGUE High Latitude Bright Survey Design for the LAMOST Pilot Survey
• The LEGUE Input Catalogue for Dark Night Observing in the LAMOST Pilot Survey

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