Box plots showing the evolution of the marginal posteriors inferred for 22 magnetograms along the emergence of AR 10268. Each panel shows the evolution of the model parameters: (a) a, (b) B₀, (c) R, (d) d₀, (e) ϕ, (f) N_t, (g) x_c, and (h) y_c. Blue and orange boxes compare the marginal posteriors obtained using σ = 10 G and σ_est = 300 G, respectively. The boxes represent the three-quartile values of the distribution (so boxes contain the 50% central part of the distribution) and the whisker extensions are fixed by a factor 1.5 of the inter-quartile range. The blue and orange lines mark the evolution of the mean value of the marginal posteriors for either σ or σ_est. Panel e: the tilt values obtained using two different methods are added (see inset). The black line in panel f corresponds to the estimation of N_t, c obtained comparing the inclination of the PIL with respect to the direction of the AR bipole. Black lines in panels g and h correspond to the AR barycenter.