Distribution of optimal g_† imposing a flat (light blue) and Gaussian (dark blue) prior. The red dashed line marks our fiducial value 1.2 × 10⁻¹⁰ m s⁻². The inset shows the Gaussian prior alone, zoomed in and switched to a linear scale to resolve the distribution. Note the vast difference in scales: the flat prior results in a broad range of g_† (although with no improvement in χ², as seen in Fig. 6), while the Gaussian prior effectively returns a constant g_†.