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Centro de Astrofísica da Universidade do Porto

SEGUE: A Spectroscopic Survey of 240,000 Stars With g = 14-20

B. Yanny, C. M. Rockosi, H. J. Newberg, G. R. Knapp, J. K. Adelman-McCarthy, B. Alcorn, S. S. Allam, C. A. Prieto, D. An, K. S. J. Anderson, S. F. Anderson, C. A. L. Bailer-Jones, S. Bastian, T. C. Beers, E. F. Bell, V. Belokurov, N. Blythe, J. J. Bochanski, W. N. Boroski, J. Brinchmann, J. Brinkmann, H. J. Brewington, L. N. Carey, K. M. Cudworth, M. L. Evans, N. W. Evans, E. Gates, B. T. Gänsicke, B. Gillespie, G. Gilmore, A. N. Gomez-Moran, E. K. Grebel, J. Greenwell, J. E. Gunn, C. Jordan, W. Jordan, P. Harding, H. Harris, J. S. Hendry, D. Holder, I. I. Ivans, Z. Ivezic, S. Jester, J. A. Johnson, S. M. Kent, S. J. Kleinman, A. Y. Kniazev, J. Krzesiński, R. G. Kron, N. Kuropatkin, S. Lebedeva, Y. Lee, R. F. Leger, S. Lépine, S. Levine, H. Lin, D. C. Long, C. P. Loomis, R. H. Lupton, O. Malanushenko, V. Malanushenko, B. Margon, D. Martinez-Delgado, P. M. McGehee, D. Monet, H. L. Morrison, J. A. Munn, Eric H. Neilsen, A. Nitta, J. E. Norris, D. Oravetz, R. Owen, N. Padmanabhan, K. Pan, R. S. Peterson, J. R. Pier, J. Platson, P. R. Fiorentin, G. T. Richards, H.-W. Rix, D. J. Schlegel, D. P. Schneider, M. R. Schreiber, A. D. Schwope, V. Sibley, A. Simmons, S. A. Snedden, J. A. Smith, L. Stark, F. Stauffer, M. Steinmetz, C. Stoughton, M. SubbaRao, A. S. Szalay, P. Szkody, A. R. Thakar, S. Thirupathi, D. L. Tucker, A. Uomoto, D. E. V. Berk, S. Vidrih, Y. Wadadekar, S. Watters, R. Wilhelm, R. F. G. Wyse, J. Yarger, D. B. Zucker

Abstract
The Sloan Extension for Galactic Understanding and Exploration (SEGUE) Survey obtained ≈240,000 moderate resolution (R ∼ 1800) spectra from 3900 Å to 9000 Å 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 σ(RV) ∼ 4 km s−1 at g < 18, degrading to σ(RV) ∼ 15 km s−1 at g ∼ 20. For stars with signal-to-noise ratio >10 per resolution element, stellar atmospheric parameters are estimated, including metallicity, surface gravity, and effective temperature. SEGUE obtained 3500 deg2 of additional ugriz imaging (primarily at low Galactic latitudes) providing precise multicolor photometry (σ(g, r, i) ∼ 2%), (σ(u, z) ∼ 3%) and astrometry (≈0''.1) for spectroscopic target selection. The stellar spectra, imaging data, and derived parameter catalogs for this survey are publicly available as part of Sloan Digital Sky Survey Data Release 7.

Keywords
Astrophysics - Galaxy Astrophysics

The Astronomical Journal
Volume 137, Page 4377
May 2009

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