Simultaneous fit to r₀ and slope γ. The black (dark grey) contour represents the 68.3% (95.5%) confidence. The red cross stands for the lowest χ² value at (r₀ = 3.65, γ = 1.25). The points show the 500 best-fit values from the 500 bootstrapped samples. The blue rectangle indicates the 16% and 84% percentiles from the marginalized single-parameter posterior distributions of the bootstrapped samples. The green (red) error bar represents the correlation length from the one-parameter PL (single-bin) fit with fixed γ = 1.8. For a better visualization, we show a zoom onto the region containing these fits.