Spectral line profiles for NGC 6286. Left panel: Herschel PACS 70 μm map (see Chu et al. 2017) with a logarithmic stretch to highlight the full extent of the infrared emission relative to the IRAM-30 m Telescope. Overlaid circles represent the pointing position and beam sizes (FWHM) corresponding to the ¹²CO and ¹³CO (inner), and HCN and HCO⁺ (outer) IRAM observations. The middle panel shows the continuum-subtracted CO spectra, fitted with Gaussian components. Velocity frame is defined according to the redshifts quoted in Table 3. Gray vertical lines correspond to the velocity integration limits of the FWZI. Right panel: continuum-subtracted spectra of ¹³CO (blue, solid line), HCN (red, dotted line), and HCO⁺ (green, dashed line) in the same velocity range as the CO spectrum. The spectra have been normalized to the peak of the CO line, and the normalization factor is shown for each line. The complete data set with all the observations, as well as a table with the fitted Gaussian components of the ¹²CO spectra is shown in Appendix A.