Photometry results of the extraction of the ESZ-XMM clusters using the proposed X-ray matched filter with the average cluster profile and assuming the position and size of the clusters are known. Top left panel: extracted versus published L₅₀₀. The error bars correspond to the estimated (scaled to L₅₀₀ units). Top right panel: histogram of the difference between the extracted and the published L₅₀₀, divided by the estimated . The central vertical line shows the median value, whereas the other two vertical lines indicate the region inside which 68% of the clusters lie. Bottom panels: difference between the extracted and the published L₅₀₀, divided by the estimated as a function of c) the scaled central density of the cluster (at 0.01 R₅₀₀), which is an indicator of the shape of the cluster profile; and d) the size θ₅₀₀ of the cluster.