Photometry results of the extraction of the MCXC clusters using the proposed X-ray-SZ filter with the average cluster profile and assuming the position, size, and redshift of the clusters are known. The top left panel is analogous to the top left panel of Fig. 2, and its subpanel shows the histogram of the difference between the extracted and the published L₅₀₀, divided by the estimated (analogously to Fig. 2b). The five other panels are analogous to those in Fig. 2, but in this case, the standard deviation used to normalize the difference between the extracted and the published L₅₀₀ is already corrected for the effect of the profile mismatch (σ_corrJ).