A2199. Top left: reprocessed MSSS map with resolution 21.6′′ × 21.6′′ and rms noise 40 mJy/beam. The contours start at 5σ level and are drawn at 200 mJy/beam × [1, 1.4, 2, 2.8, 4, 5.7, 8, 11, 16, 22, 32, 45]. Top right: Chandra X-ray surface brightness residual map. The image is produced by unsharp masking using archival data in the 0.5–7 keV band with total exposure of 154 ks after standard filtering. The east, west, and south cavities are denoted by “E”, “W”, and “S”, respectively. The SE surface brightness edge is denoted by arrows. Contours correspond to the MSSS image. Bottom: TGSS map with resolution 25.0′′ × 25.0′′ and rms noise 10 mJy/beam. The contours start at 3σ level and are drawn at 30 mJy/beam × [1, 1.4, 2, 2.8, 4, 5.7, 8, 11, 16, 22, 32, 45, 64, 91, 128, 182].