Continuum 1.4 GHz contours (red; from Condon et al. 1996) of NGC 3278 on the optical r-band image of the galaxy (Pignata et al. 2011). The lowest contour is at 1 mJy beam⁻¹ and the step is 2 mJy beam⁻¹. The position of SN 2009bb is indicated by the blue circle. Radio continuum emission peaks close to this position. The beam size of the radio data is shown as the grey circle. The image is 120″ × 120″. North is up and east is left.