Fig. 7
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3C 273 ridgeline histogram with the brightness measured relative to the core. The image has been rotated counterclockwise by 42° such that the top of the image points north-west. The features around the core are likely to be imaging artefacts. The green dashed line shows the results of Davis et al. (1985), and the dotted black line the 3σ RMS noise of the LOFAR image.
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