Mixture spin distributions: Probability density functions of the reconstructed spin magnitudes, χ, and the cosine of the tilt angles for each of the three mixture inferences, obtained on the 59 BBHs with an IFAR ≥ 1 yr from the GWTC-3 catalog. The red curves (Pop1) are the spin magnitudes and tilt angles found for the first population and the blue curves (Pop2) for the second population. The light blue curves (Total) are the combined distributions. The contours are the 90% and 95% confidence intervals.