Fig. 5

Multiwavelength picture of A523. A smoothed Rosat image (green color) is superimposed on the DSS2-red image. The black circles indicate the regions of 2′-radius around the NNE and SSW galaxy groups. The BCG is clearly visible at the center of the NNE circle. Contour levels of the radio image of the extended halo after the subtraction of discrete sources are shown in red.
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