Rotation curves for the flat (green line) and mass models (orange dashed) of galaxy 104-CGR79 at redshift z = 0.53. The components are the bulge (red), the thin disk (blue), and the DM halo (black). We also show the observed de-projected (but beam-smeared) rotation curves extracted along the major axis from the observed velocity field map (black crosses), from the best-fit velocity field flat model (green circles), and from the best-fit velocity field mass model (orange triangles). The largest difference between the flat and mass models is found in the inner parts, where the beam smearing is the strongest. The total dynamical mass differs slightly between models, with the flat one being 4% higher than the mass model one.