CO(2–1) integrated intensity contours calculated from –485 to 500 km/s using the dilated masking technique for NGC 1097 overplotted on the Spitzer/IRAC 8 μm continuum map. The contours are plotted on 8 log-spaced intervals, ranging from 0.15 Jy km/s to 75.6 Jy km/s. The dashed yellow circle marks the position of the companion galaxy NGC 1097A. The dashed box shows the slice used for the major axis position-velocity cut. The beam size of the APEX observations (28$\stackrel{″}{.}$7) is shown in the bottom left.