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Context: Empirical libraries of stellar spectra play an important role indifferent fields. For example, they are used as reference for the automaticdetermination of atmospheric parameters, or for building synthetic stellarpopulations to study galaxies. The CFLIB (Coude-feed library, Indo-US) databaseis at present one of the most complete libraries, in terms of its coverage ofthe atmospheric parameters space (Teff, log g and [Fe/H]) and wavelengthcoverage 3460 - 9464 A at a resolution of 1 A FWHM. Although the atmosphericparameters of most of the stars were determined from detailed analyses ofhigh-resolution spectra, for nearly 300 of the 1273 stars of the library atleast one of the three parameters is missing. For the others, the measurements,compiled from the literature, are inhomogeneous.  Aims: In this paper, we re-determine the atmospheric parameters, directlyusing the CFLIB spectra, and compare them to the previous studies.  Methods: We use the ULySS program to derive the atmospheric parameters, usingthe ELODIE library as a reference.  Results: Based on comparisons with several previous studies we conclude thatour determinations are unbiased. For the 958 F,G, and K type stars theprecision on Teff, log g, and [Fe/H] is respectively 43 K, 0.13 dex and 0.05dex. For the 53 M stars they are 82 K, 0.22 dex and 0.28 dex. And, for the 260OBA type stars the relative precision on Teff is 5.1%, and on log g, and [Fe/H]the precision is respectively 0.19 dex and 0.16 dex. These parameters will beused to re-calibrate the CFLIB fluxes and to produce synthetic spectra ofstellar populations.

Coude-feed stellar spectral library - atmospheric parameters