Probability of detection as a function of core properties. The dashed lines represent the normalised distribution of the full population. Top panel: Completeness fraction as a function of emissivity profile ratio measured at R_500c and in the inner most bin. Different flux intervals are encoded in different colours. Bottom panel: Completeness fraction as a function of flux for the cool core (non-cool core) systems with profile ratio smaller (larger) than the median values of 0.001.