Posterior distribution of the parameters s, f, and w. The astrometric wobble amplitude w is computed from the equation introduced in the text. The red line is plotted solving the relationship of f and s with w = 0.053 (median of its distribution). The blue line is taken at the mode of the distribution of f = 0.11, and we take it as one of the most probable solutions of this system. The corresponding value of s is 1.33.