Images at 4.8 GHz of the sources detected at this frequency. The FWHMs of the Gaussian‐restoring beams are shown in the insets in all panels. Contour levels (solid lines) are a geometric progression in the square root of two starting at 2 σ, with σ listed below (σ corresponds to the measured rms on the image). Two negative contours (dashed lines) are included. The central cross in each image marks the optical QSO location. (a) J0937+7301, ﹩\sigma =59﹩ μJy beam⁻¹; (b) J1409+5628, ﹩\sigma =56﹩ μJy beam⁻¹; (c) J1543+5359, ﹩\sigma =48﹩ μJy beam⁻¹; (d) J1649+5303, ﹩\sigma =53﹩ μJy beam⁻¹.