Correlation diagrams showing the probability distributions of the best-fit parameters from the MCMC modelling of the ellipsoidal light curve. The 2D plots display contours corresponding to the 68%, 95%, and 99.7% confidence regions. Rightmost panels: Projected 1D distributions of the parameters, with the median indicated by a solid line and the 68% confidence intervals marked by dashed lines. The value of K₂ is inferred from q, M_NS, P, and i, whereas the value of M₂ is inferred from q and M_NS.