Contoured maps for the VLBI-detected source J123555.14+620901.7. a: EVN 1.6 GHz image plotted with contour levels (3, 4, 5, 6, and 7) × the rms noise level; the white cross presents the VLA coordinates measured by Richards (2000). The FoV of this image is shown by a red box in each of the other three sub-figures. b: Hubble CANDELS F814W ACS image in which the source shows a face-on disc-like morphology with a close companion for clarity; the image was smoothed with a 2D Gaussian convolution with FWHP of ∼0.1″. The overlaid contour was plotted at 3, 6, 12, 24, and 48 × the rms noise of the eMERGE-JVLA maximum sensitivity image at 1.5 GHz. c: eMERGE re-weighted 1.5 GHz map presented with contour levels 3, 6, 12, and 24 × the rms noise level. d: eMERGE 5.5 GHz map plotted with contour levels (3, 4, and 5) × the rms noise level. The detected compact AGN core is clearly shown in the images. In each panel, the beam pattern of the contours is illustrated with a black ellipse.