Surface brightness fluctuation maps, Δ_abs, from the absolute method (see Sect. 2.6) for the X-COP cluster sample. The successive contours represent the annular regions I, II, III, and IV with outer radii of 0.1, 0.25, 0.5 and 1R₅₀₀, respectively. For display purposes, the images are filtered by a Gaussian kernel of 7.5″. Each image is ∼2.5 Mpc on a side. The images are ranked in ascending order of disturbance for the cluster as measured by the C_Z coefficient (see Sect. 4.1).