CO(1–0) PV diagrams of NED01, extracted from a datacube where velocities are calculated with respect to the previously known redshift of the source (z = 0.0184). The PV diagrams confirm that our new redshift estimate of z = 0.0178 ± 0.0004, indicated with a black cross, closely matches the kinematic centre of the CO(1–0) source. The upper panel shows the PV diagram obtained from a slit-like aperture along the axis connecting the blue and red peaks of the CO(1–0) emission, with a size of ∼30″ and a position angle of 95° (measured anti-clockwise from the north direction). The PV diagram shown in the bottom panel was computed from a slit-like aperture with a size of ∼9″ orthogonal to the previous one.