(left panel) NIR polarization PAs vs. distance, based on parallaxes from Gaia DR2, for the 47 stars having some reasonable probability of being closer than 500 pc. Blue symbols and error bars represent H-band values and green bars and symbols represent K-band values. Symbol size and thickness and error bar thickness relate to S/N, with thicker lines indicating higher S/N. Orange lines indicate the two MCMC fitted PA values and the transition parallax, described in the text. Dotted orange lines identify 1σ certainty bands. (right panel) MCMC corner plot showing two-dimensional likelihood distributions and marginalized one-dimensional histograms for the two fitted PAs and the transition parallax value. The transition parallax marks the onset of the uniform PA of the B field associated with GF 9 at 270 ± 10 pc.