SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20

Details SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20 SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20

2009-02-11

arxiv.org/abs/0902.1781v2

Astron.J.137:4377-4399,2009

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

17 figures, AJ in press, updated to match Journal version

Scientific paper

10.1088/0004-6256/137/5/4377

The SEGUE survey obtained 240,000 moderate resolution (R = 1800) spectra from 3900 - 9000 Angstroms of fainter Milky Way stars (14.0 < g < 20.3) of a wide variety of spectral types, both main sequence and evolved objects, with the goal of studying the kinematics and populations of our Galaxy and its halo. The spectra are clustered in 212 regions spaced over three-quarters of the sky. Radial velocity accuracies for stars are 4 km/s at g < 18, degrading to 15 km/s at g = 20. For stars with S/N > 10 per resolution element, stellar atmospheric parameters are estimated, including metallicity, surface gravity, and effective temperature. SEGUE obtained 3500 square degrees of additional ugriz imaging (primarily at low Galactic latitudes) providing precise multi-color photometry (g,r,i = 2%), (u,z = 3%) and astrometry (0.1 arcsec) for spectroscopic target selection. The stellar spectra, imaging data, and derived parameter catalogs for this survey are publicly available as part of SDSS Data Release 7 (DR7).

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