The impact of changing the lens mass in BAGLE models for PSPL photometry (top) and astrometry (middle). Three models are shown (different colors) with similar lightcurves, but with different lens masses and with ﹩{\mu }_{{\rm{S}}}\propto 2.0{({M}_{{\rm{L}}}/0.1\,{M}_{\odot })}^{0.5}﹩ mas yr⁻¹ and ﹩\beta \propto 0.5{({M}_{{\rm{L}}}/0.1\,{M}_{\odot })}^{0.5}﹩. The remaining model parameters include X_S,0,⊙ = [0.0, 0.5] mas, μ_L,⊙ = [0, 0] mas yr⁻¹, d_L = 3 kpc, d_S = 8 kpc, b_SFF = 1, mag_S = 19, t₀ = 57200 MJD, α = 262﹩\mathop{.}\limits^{\unicode{x000b0}}﹩5, and δ = −30°.