Graphs of b₀ for the NPIPE dataset for various degraded and smoothing scales. Panel a: observational curve in yellow, and the curves corresponding to the average of simulations are presented in gray. Error bands corresponding to (1σ : 3σ) are also drawn. Panel b: curve for the significance of the differences, where the observed curves are presented in red, and the values for the simulations are presented as dotted gray lines.