Contours of the diffuse radio emission around B2 0258+35 overlaid on a DSS2 image. The contour levels range from 0.2 mJy beam^-1 to 20 mJy beam^-1 (2σ to 20σ) increasing by a factor of 1.5 and are marked in black. Negative countours at −0.2 mJy beam^-1 are gray. The inset at bottom right shows the VLA image of the central CSS source (Giroletti et al. 2005). Note the similarity in the orientation between the CSS source and the diffuse emission.