χ² map in the d,q plane, showing the location of the four local minima identified by our modelling runs. Out of these, local minima A and D are competitive, with local minima B and C having Δχ² ~ 50 and 70 respectively, for the same number of parameters. Minima A and D correspond to the close and wide ESBL + parallax models discussed in the text. Different colours correspond to Δχ² <  25 (red), 100 (yellow), 225 (green), and 400 (blue); we note that the χ² map is based on the original data, before error-bar normalisation, and therefore the Δχ² levels are slightly different from those given in Table 2. The top panel shows the breadth of our parameter space exploration, encompassing planetary and non-planteray mass-ratio regimes, while the bottom panel shows a zoom on the region where our local minima are located.