VLA C- (left) and D-array (right) images. The contour starts from 3σ, where σ_C−array = 40 μJy beam⁻¹ and σ_D−array = 85 μJy beam⁻¹. The subsequent contours are multiplied by a factor of two. The synthesised beams are drawn in the bottom-left corners (i.e. 16″ × 16″ for the C-array image and 46″ × 46″ for the D-array image). The LOFAR 45.7″ × 44.7″ resolution contour is the same as that in Fig. 1.