Inferred posteriors for v_∞ and b for GW200105 based on the formalism in Section 3. As input, we have used eccentricity posteriors for e_f from two different analyses on GW200105 by G. Morras et al. (2026b) (blue/solid) and K. Kacanja et al. (2025) (red/dashed–dotted). Dotted lines show the assumed prior. For the prior distribution of b, we have plotted the conditional prior on b from Equation (14), which depends on v_∞ for each independent draw in the sampling. Vertical lines show symmetric 90% credible intervals.