Left panel: CO(2–1) maximum-intensity image at 0.′′085 resolution. Right panel: 1.3 mm continuum image (red contours starting at 0.2 mJy beam⁻¹ and with a spacing of 0.3 mJy beam⁻¹) at 0.′′ 15 resolution overlaid an F606W HST image from Sahai et al. (2007). The latter has been shifted so that the diffraction cross coincides with the continuum peak. The CO line intensity peak at the centre coincides with the continuum peak within an uncertainty of about 0.′′ 01.