Selection function of clusters with different redshifts and luminosities as a function of concentration that were calculated from simulated observations of spherical clusters. The panels show the detected fraction of clusters at different redshift. For each redshift, we show the detection fraction as a function of concentration for different luminosities (erg s⁻¹). The log concentration (c_{80 − 800}) is computed from the input model profile and is binned into bins of 0.1 width.