Chi-squared contours plotted as a function of the parameters fitted in the MCMC fit for the best model, GF+. Black, dark grey, and light grey solid colours represent 1σ, 2σ, and 3σ confidence regions, respectively. Black dots represent solutions outside of the 3/sigma confidence level. Blue lines and squares mark the median solution reported in Table 4. Plot was created using corner python package by Foreman-Mackey (2016).