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Title:
SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
Authors:
The SDSS-II SEGUE Collaboration: Brian Yanny; Rockosi, Constance; Newberg, Heidi Jo; Knapp, Gillian R.
Publication:
eprint arXiv:0902.1781
Publication Date:
02/2009
Origin:
ARXIV
Keywords:
Astrophysics - Galaxy Astrophysics
Comment:
17 figures, AJ in press, updated to match Journal version; Astron.J.137:4377,2009
Bibliographic Code:
2009arXiv0902.1781Y

Abstract

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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arXiv e-prints