Correlation diagrams for the joint posterior probability distributions of the four tomography parameters, namely λ, v sin i_⋆, v_FWHM, and v₀. The colours of the dots reflect the Δχ² of each point, with thresholds at 2.30, 6.17, and 11.8, to show the two-parameter one, two, and three-sigma confidence regions in yellow, red, and blue, respectively (see the online edition of the journal for a color version of this figure).