Noise correlation ratio β (ratio of the real estimated error to the analytically propagated error) as a function of number of spaxels per bin for all the V500 (upper panel) and V1200 (lower panel) data of DR2 at a target S/N of 20. Shaded areas mark the 1σ, 2σ, and 3σ levels. The orange lines represent the best-fit logarithmic function with a slope α = 1.07 and α = 1.06, respectively.