North is up and east is to the left.
The field of view is approximately 3' x 1.5'. The polarization pattern is complex, well-resolved and exhibits many features characteristic of multiple scattering models in a dusty nebula with an evacuated, bipolar cavity. For this reason, fitting all the polarization vectors to a centrosymmetric pattern is shown to be flawed, and can actually cause errors in positional estimates. The 0,0 position corresponds to HW-2. North is up and east is to the left.