Likelihood surface for our extended sample of 22 stars illustrated in the form of a contour plot. The maximum of the likelihood function is indicated by a small cross and is arbitrarily normalized to 1. It is characterized by a mean mass of μ = 0.4687 M_⊙ and a standard deviation of σ = 0.0242 M_⊙. The contours have values of 0.9 (smallest loop), 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, and 0.1 (largest loop).