Beschreibung:
<jats:p><jats:italic>Context</jats:italic>. The X-shooter Spectral Library (XSL) is an empirical stellar library at medium spectral resolution covering the wavelength range from 3000 Å to 24 800 Å. This library aims to provide a benchmark for stellar population studies.</jats:p>
<jats:p><jats:italic>Aims</jats:italic>. In this work, we present a uniform set of stellar atmospheric parameters, effective temperatures, surface gravities, and iron abundances for 754 spectra of 616 XSL stars.</jats:p>
<jats:p><jats:italic>Methods</jats:italic>. We used the full-spectrum fitting package ULySS with the empirical MILES library as reference to fit the ultraviolet-blue (UVB) and visible (VIS) spectra. We tested the internal consistency and we compared our results with compilations from the literature.</jats:p>
<jats:p><jats:italic>Results</jats:italic>. The stars cover a range of effective temperature 2900 < <jats:italic>T</jats:italic><jats:sub>eff</jats:sub> < 38 000 K, surface gravity 0 < log<jats:italic>g</jats:italic> < 5.7, and iron abundance −2.5 < [Fe/H] < +1.0, with a couple of stars extending down to [Fe/H] = −3.9. The precisions of the measurements for the G- and K-type stars are 0.9%, 0.14, and 0.06 in <jats:italic>T</jats:italic><jats:sub>eff</jats:sub>, log<jats:italic>g</jats:italic>, and [Fe/H], respectively. For the cool giants with log<jats:italic>g</jats:italic> < 1, the precisions are 2.1%, 0.21, and 0.22, and for the other cool stars these values are 1%, 0.14, and 0.10. For the hotter stars (<jats:italic>T</jats:italic><jats:sub>eff</jats:sub> > 6500 K), these values are 2.6%, 0.20, and 0.10 for the three parameters.</jats:p>