LOFAR image of GB 1508+5714 at 144 MHz. The source brightness is colour-coded by flux-density, with the contour lines overlaid. The crossed circles indicate the modelled Gaussian components as hot spots. The contour levels are drawn at (−1, 1, 2, 4, 8, …) times 0.78 mJy beam⁻¹. The RMS is 0.13 mJy beam⁻¹. The restoring beam size (shown in the bottom left) is 1.08″ × 0.643″ with a position angle of −0.27°.