The Gaia-ESO Survey science archive comprises calibrated one- and two-dimensional spectra for stars observed in the GES survey and a variety of astrophysical parameters (heliocentric radial velocity, effective temperature, surface gravity, metallicity etc) derived from these spectra.
GES is a public spectroscopic survey of approximately 100,000 stars, systematically covering all the major components of the Milky Way, from the halo to star-forming regions and providing the first homogeneous overview of the distributions of kinematics and elemental abundances. The target stars were observed using the FLAMES spectrograph on the ESO VLT at Paranal in Chile. The survey was conducted in support of the ESA Gaia astrometric satellite, but will have numerous other uses.
GES includes stars representative of the main components of the Galaxy: inner and outer bulge, inner and outer thick and thin discs, the halo and known halo streams. There is a special focus on open clusters of all ages and on solar neighbourhood field stars, as these trace both stellar and Galactic evolution, complement the Gaia astrometry, and will benefit most from the most precise Gaia data. Specifically, the survey includes the following components or programmes:
Halo/Thick Disc Survey,
Outer Thick Disc, 2-4 kpc from the Sun,
Thin Disc Dynamics,
The entire GES survey is organised in a single schema, which includes tables, views, indices and constraints.