Fig. 2

The 4.8 GHz VLA contours obtained from the combined A- and B-array archival observations of RBS 797, imaged at different resolutions, are overlaid onto the Chandra image of the central region of the cluster (left panel). Green contours: 4.8 GHz VLA map at resolution, obtained by setting ROBUST=+5, UVTAPER=250; the rms noise is 0.01 mJy beam-1 and the contour levels are 0.03, 0.06, 0.12, 0.24, 0.48, and 0.96 mJy beam-1; the total flux density is ~4 mJy, with a peak flux density of 1.5 mJy beam-1. Black contours (best visible in the zoom in the right panel): 4.8 GHz VLA map at
resolution, obtained by setting ROBUST=0, UVTAPER=0; the rms noise is 0.01 mJy beam-1 and the contour levels are 0.04, 0.08, 0.16, 0.32, and 0.64 mJy beam-1; the total flux density is ~2.8 mJy, with a peak flux density of 1.0 mJy beam-1.
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