Posterior distribution of the four parameters (i, q, f, and T₂/T₁) for CSS_J042157.5−001751 derived using the proposed method. In each diagonal panel the solid vertical line represents the median (50th percentile) of the parameter distribution. The dashed lines indicate the 68% credible interval, while the dotted lines mark the 95% credible interval. These intervals are also reflected in the off-diagonal contour plots, with the corresponding statistical values provided above the diagonal panels, helping to determine parameter uncertainties.