Continuum GMRT 1.4 GHz contours (red) of CGCG 137-068 on the Gran Telescopio Canarias optical i′-band image of the galaxy (Kann et al., in prep.). The lowest contour is at 2σ (σ = 17 μJy beam⁻¹) and the steps are in factors of . The VLBI position of AT 2018cow is indicated by the white circle. We detected the emission of AT 2018cow at this position and an additional object in the north-eastern part of the galaxy. The beam size of the radio data is shown as the grey circle. The image is 30″ × 30″ and the scale is indicated by the ruler. North is up and east is to the left.