Distribution of the polarized sources from the PCCS2 (top) and the PCCS2E (bottom). Red, blue, green, and black circles show sources from the 100, 143, 217, and 353 GHz catalogues, respectively. As in previous figures, the size of the filled circles gives a qualitative idea of the relative flux densities of the sources at each frequency, where the larger dots correspond to larger flux densities. Note that a different circle size range for each channel was necessary for visualization purposes.
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