Constraints on the fluctuation model obtained for the reference analysis. Left: comparison between the data and model for the 2D SZ fluctuation power spectrum, in the case of radial model RM₃. The residual shows the offset to the best-fit model relative to the uncertainties, accounting or not for intrinsic model variance (sample variance). Shaded area provide 68% and 95% confidence intervals. Right: constraints on the 3D pressure fluctuation power spectrum for the different radial model, with 68% confidence interval shown. The sample variance is included in the error budget.