Log-likelihood as a function of radial scale length (R₀ or σ_r) and vertical scale height (z₀) for the model ST1. The panels show (from top left to bottom right) the results for 36 MSPs a), 66 MSP candidates b), 36 mock MSPs c), and 66 mock MSPs d). Contours show the 1, 2, and 3σ confidence ellipses that have been computed from the log-likelihood maps (colours). All maps show the same dynamic range in log-likelihood.