Calibrator J0958+6533 at 154 MHz using baselines longer than 60 kλ. The rms noise is σ = 0.2 mJy/beam. The beam of 0.36′′ × 0.23′′ is shown in the bottom left. The contour levels are (−10, −5,5,10,20,40,80,125,250,500,1000,2000) × σ. A southwest extension is clearly visible, although the point source is 100 times brighter than the extension. This image was obtained using the multi-scale option in CLEAN (CASA 4.2.1) with scales =[0, 40, 80, 160] pixels, with pixel size 0.02′′.