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Fig. 2

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Uniform weighted VLBA CLEAN images with fitted circular Gaussian components at different frequencies for the 2006 July observation of CTA 102. The lowest contour is plotted at 10 ×  the off-source rms at 43   GHz and increases in steps of 2. The observing frequency and the restoring beam size are plotted above each map. For the labeling we used capital letters for the same physical region in the jet and the numbers increase with inverse distance from the core. For a more detailed picture of the core region see Fig. 3.

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