L_X − T_X relation for the 46 sources with spectral analysis. The solid blue line is the best fit of the L_X − T_X for our sample. The dashed green line is the best fit for the combined cluster sample analyzed by Branchesi et al. (2007b) computed for ⟨ z ⟩ = 0.25, while the black, dot-dashed line is for the “all cluster” sample presented in Maughan et al. (2012) and computed for ⟨ z ⟩ = 0.25. Luminosities are consistently computed at the estimated radius R₅₀₀. Error bars correspond to 1σ error both in temperature and luminosity.