Density probabilities as a function of heliocentric relative proper motion for Gaia18ajz event for two mass functions, StellarIMF and DarkIMF, and their components from disk and bulge. Thin dashed lines show the density of lenses along the line of sight (distance prior), while dotted lines show the velocity (relative proper motion) priors. Dot-dashed line shows the mass function combined with the Jacobian.