In section 8. Stellar atmospheres
The Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
The Gaia-ESO Public Spectroscopic Survey will ultimately obtain high quality spectroscopic data for about 5 000 FGK-type stars using the FLAMES-UVES link at the VLT. This will be among the largest homogeneously analyzed samples of its kind. The extensive list of elemental abundances derived in these stars will enable significant advances in the areas of stellar evolution and Milky Way formation and evolution. In this paper, 1301 UVES spectra of Gaia benchmark stars and several stars clusters are analyzed in parallel with several different state-of-the-art methodologies. This paper presents these separate analyses and describes how the final recommended parameter scale is defined along with the precision and accuracy of the final parameters. These results are part of the Gaia-ESO second internal release and will be part of its first public release of advanced data products.