Left panel: stacked PSZ2 profiles in the 857 GHz Planck band (black diamonds) and best fit profile (blue dash-dotted line). Error bars are determined from bootstrap realizations. The data points are strongly correlated, as shown in the right panel. The orange dash-double dotted line shows the best fit profile obtained when adjusting jointly the stacked PSZ2 profile and the inverse-variance weighted average matched filter flux in the Planck 857 GHz band. Right panel: correlation matrix (diagonal normalized to unity) of the 20 first bins of the stacked profiles starting from the center (bin zero is the most central bin). The bins are strongly correlated (>75%).