WENSS intensity image of BD+60°2522. The brightest source (south) corresponds to the unresolved emission from the BS of BD+60°2522 together with the dense ionised clumps (Sect. 2.2); the northern arc-shaped source is not from the BS itself, and is also detected in the 4–12 GHz map by Moutzouri et al. (2022). The map has rms = 10 mJy beam⁻¹ and an angular resolution of 54″×62″. Contour levels are at 30, 50, 80, 120, and 170 mJy beam⁻¹.