Posterior probability distributions for NS parameters when combining fits from three realisations of synthetic data produced assuming a 200 ks (left panels) and a 1 Ms (right panels) exposure time and the fiducial model shown in Table 1. In the two-dimensional posterior distributions, the black colour shows a 68% and the grey colour shows a 95% highest posterior density credible region. In the one-dimensional posterior distributions, the red dashed lines show a 68% and the dark orange dashed lines show a 95% highest posterior density credible interval. The blue lines show the input values.