Polarization fraction P for starlight polarization measurements inside vs. outside of the LB.  Left: P as a function of distance from the nearest surface of the LB.  Stars inside the LB are marked by the small red points, while stars outside are marked by the larger and less opaque blue points.  The average trend for increasing P as a function of distance is shown by black curve, generated using LOWESS regression (Locally Weighted Scatterplot Smoothing).  Top right: Kernel density estimations of the distributions of inside (red) vs. outside (blue) of the LB.  Bottom right: Cumulative distributions of P for stars inside vs. outside of the LB.