Radio halo in A3558. In both panels the magenta cross shows the position of the brightest cluster galaxy (BCG). Upper panel: ASKAP image at 887 MHz in colour (same resolution and rms as in the upper panel of Fig. 3). The black contours show the emission of the halo after subtraction of the embedded point sources (see Sect. 4.7). The resolutions is 25.1″ × 20.9″, in p.a. 131.5° and the rms is ∼35 μJy beam⁻¹. Contour levels start at ±0.15 mJy beam⁻¹ and are spaced by (negative contours in green). Lower panel: MeerKAT image at 1.283 GHz in colour (same resolution and rms as in the central panel of Fig. 3). The black contours show the emission after subtraction of the point sources (see Sect. 4.7) convolved with a restoring beam of 40.9″ × 40.4″, in p.a. 144.6°. The rms is ∼35 μJy beam⁻¹. Contour levels start at ±0.125 mJy beam⁻¹ and are spaced by (negative contours in green).