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Fig. 5.


ATCA observations after subtraction of compact source components (see Sect. 2.4 for details). The maps correspond to the 2.1 GHz data generated assuming Briggs weighting with robust parameter set to 0.00 (upper; σ = 23 μJy beam−1), and to the naturally weighted 2.1 GHz (middle; σ = 87 μJy beam−1) and 5 GHz (lower; σ = 19 μJy beam−1) images. As in Fig. 3, the triangle marks the BCG position (Song et al. 2012). To better highlight the extended radio features, we applied uv-tapers of 10 and 20 kλ to the 2.1 and 5 GHz measurements, respectively. For all panels, the contours start from the 3σ level, with increment every 1σ. The higher resolution offered by ATCA allows us to disentangle the small-scale morphology of the diffuse radio structure detected by EMU (dotted contours).

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