Normalized temperature profiles for all clusters in the sample. CC clusters are plotted with filled squares, while NCC clusters are shown as open squares (see Sect. 4.2.1). The best fit to the Vikhlinin et al. (2006) relation, freeing the normalization, is drawn as a blue solid line. The blue dotted line represents the best fit to the relation in Eq. (3) (with ξ₀ = 0.45), while the blue dashed line is the best fit of Eq. (5) for r > 0.15r₅₀₀.