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Fig. 5.


Sample VLBI images of OJ 287 at 15 GHz and 43 GHz in the top and bottom panels, respectively. Each panel contains total intensity (Stokes I) contours, with linearly polarized intensity overlaid according to the color wedges. The short bars within the contours indicate the EVPA orientation. The total intensity contours represent roughly 0.5%, 0.9%, 1.6%, 2.8%, 5%, 9%, 16%, 28%, 50%, and 90% of the peak flux densities of 4.66 Jy beam−1 and 2.38 Jy beam−1 for the 15 GHz and 43 GHz maps, respectively. The ellipses in the lower left of each panel indicate the FWHM dimensions and orientation of the restoring beam. The 15 GHz image was observed on June 16, 2016 (MJD 57555) and the 43 GHz image on December 5, 2015 (MJD 57361).

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