Fit results of ionised-gas emission lines and CO(1-0)/CO(2-1) lines. On the left, we show the 70″ × 70″ legacy survey snapshots (Dey et al. 2019) and mark the position of the SDSS 3″ fibre in red and the IRAM CO(1-0) (resp. CO(2-1)) beam of 23″ (resp. 12″) with a green (resp. black) dashed line. For interferometry observations conducted by Bauermeister et al. (2013), we show the beam with a blue ellipse. For DP-24, DP-25, and DP-31, we show the FCRAO CO(1-0) beam of 50″. For DP-1, we extracted a CO(1-0) signal from ALMA interferometry observations for the exact same area as the SDSS 3″ fibre. Next to the snapshots, we show the Hα emission line and the [NII]λ6550/6585 doublet fitted with a double-Gaussian function. On the right hand side, we show the CO(1-0) and the CO(2-1) line, if observed, fitted by a single, a double, or a triple-Gaussian function. In the case of a successful combined fit as described in Sect. 3.1, we indicate this in the top left of the CO panels. For a detailed description of the fitting procedure, see Sect. 3.1.