Notes. We also report the value from the literature (i.e. ξ values from Jofré et al. 2015 -J15-, while T_eff, log g, [Fe/H] and [Ti/H] are from Jofré et al. 2018 -J18-) and from the Gaia-ESO iDR5 catalogue (GESiDR5). The numbers of the lines we used in the analysis are in square brackets. The uncertainties are calculated as the quadratic sum of the σ₁ and σ₂ contributions (see Sect. 4.4 for details). ^(*)The solar values are in log(X) scale.