Absolute iron abundance trends with excitation potential χ_ex of Fe i lines in HD 122563 for the reference effective temperature (T_eff,true = 4587 K, gray points) and the one that satisfies excitation equilibrium best (T_eff = 4387 K, red points). Error bars are the results of propagating σ_EW,tot through the abundance analysis. The weighted means for each realization are represented by the black dashed lines.