WISE colour-colour magnitude plot within each IRAM pointing. A solid black line indicates the fit of the star formation sequence from Jarrett et al. (2019, see their Fig. 10 and Eq. (1)), while the vertical dotted line separates the intermediate and star-forming disks. The polygon at the top of the figure, outlined with a dashed line, maps the region of WISE-obscured AGNs, QSOs, LINERs, and ULIRGs. The dash-dotted line indicates the region where low-power Seyferts and LINERs reside (see also Jarrett et al. 2011; Yao et al. 2020), which is where the central pointings of NGC 4593 and NGC 3504 (x symbols) lie.