Fig. 3.
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Map of RMint and EVPA0. The tick markers show the average EVPA0 across a 3 × 3 pixel region. The contours are the lowest Stokes I contour levels for all frequencies from Fig. 1. The observed EVPA against λ2 for the three pixels marked by numbers 1,2 and 3 are plotted in Fig. 4. The purple ellipse in panel shows the restoring beam used for all four frequencies.
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