Left: Low-resolution source-subtracted LOFAR image of A773 at 144 MHz overlaid with LOFAR 2σ contours. Middle: Low-resolution source-subtracted uGMRT image of A773 at 650 MHz overlaid with uGMRT 2σ contours. Right: XMM image of A773 overlaid with LOFAR source-subtracted contours. The contour levels are spaced as ( − 2, 2, 4, 8, 16, 32) × σ_rms. LOFAR and uGMRT source-subtracted images have a resolution of 50′′ × 50′′. The region drawn around the halo represents the r₅₀₀ scale of the cluster.