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Fig. A.10.
High-resolution 144 MHz LOFAR image of A1423. The contour levels start at 3σ, where σ = 170 μJy beam−1, and are spaced by a factor of two. The negative contour level at −3σ is overlaid with a dashed line. The beam is 13′′ × 12′′ and is shown in grey in the bottom left corner of the image.
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