Ultra-wide pair fraction F within the whole Taurus region (sample S₁) as a function of separation, plotted using Δδ_P = 0.25 dex bins. The solid blue line is a power law fit to the data (, with log  α = −1.21 and β = 0.14) between 3 and ~60 kAU (vertical black dashed line). The gray area represents the 95% confidence band. In terms of the power law parameters, the corresponding parameter 95% confidence intervals are log  α = [ −1.78,−0.65 ], β = [ 0,0.28 ].