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Fig. 1.

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Radio maps of A1213 at different frequencies. Left: 54 MHz LOFAR image of A1213 produced with briggs −0.3. The rms noise is ∼3 mJy beam−1, and white contours are [−3, 3, 6, 12, 24...] × rms. The beam is 22″ × 18″. Central: 144 MHz LOFAR image of A1213 produced with briggs −0.3. The rms noise is ∼100 μJy beam−1, and white contours are [−3, 3, 6, 12, 24...] × rms. The beam is 8″ × 5″. Right: 380 MHz uGMRT image of A1213 produced with briggs −0.3. The rms noise is ∼60 μJy beam−1, and white contours are [−3, 3, 6, 12, 24...] × rms. The beam is 7″ × 5″.

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