Upper row: marginal distributions (black) of M, t, and Z₀ from the results presented in Fig. 3 (Sect. 3), and the distribution for these same parameters as determined from the local analysis (red Gaussians, Sect. 2.4, Table 5). Bottom row: marginal distributions for the same parameters, but restricted to a small interval around the values of α given in Table 5. The red lines are similar to those in the upper row.