1.3 mm (Band 6) continuum image of XID2028 obtained with Briggs weighting. Dashed contours are drawn at negative 2σ fluctuations.Solid contours are drawn at 3, 4, 6, and 8σ with respect to the image rms (with this weighting scheme, rms = 9.6 μJy beam⁻¹). The large FoV is shown to highlight the significance of the continuum detection. The two components detected in the continuum (“nucleus” and “plume”) are labelled in the image. The (white) circle represents a reference region of 1″ diameter centred on the continuum peak emission. The orange ellipse denotes the position of the ionised outflow reported in Cresci et al. (2015a; see also Sect. 6). North is up and east is left.