Ratio between our estimate of the 0.1−2.4 keV band luminosities L₅₀₀ and the XMM-Newton measurements of Pratt et al. (2009) as a function of L₅₀₀. Blue stars indicate cool core clusters while red squares morphologically disturbed clusters. Solid lines indicate error weighted means and dashed lines represent the error weighted means  ±  error weighted standard deviations (black for all clusters, blue for cool core clusters, and red for morphologically disturbed clusters as defined in Pratt et al. 2009).