A1413. Top left panel: high-resolution 144 MHz LOFAR image of A1413. The contour levels start at 3σ, where σ = 270 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 10′′ × 9′′ and is shown in grey in the bottom left corner of the image. The insert box shows the uv-cut high-resolution image of the central sources that are subtracted to obtained the image in top right panel. Top right panel: low-resolution 144 MHz LOFAR image of A1413. The contour levels start at 3σ, where σ = 450 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 20′′ × 20′′ and is shown in grey in the bottom left corner of the image. This image was obtained after the CSS with a taper of 20′′ and Briggs weighting (robust = 0). Bottom left panel: optical SDSS image of A1413 with the high-resolution (10′′ × 9′′) 144 MHz LOFAR contours overlaid. The red circles indicate the cluster-member galaxies with available spectroscopic redshift. Bottom right panel: Chandra X-ray image of A1413 smoothed on a scale of 5′′ with the low-resolution (20′′ × 20′′) 144 MHz LOFAR contours overlaid.