ALMA (black) and JCMT (blue) continuum-subtracted CO J = 6−5 spectra compared in the same 8′′ beam marked in Fig. 1. The dashed lines indicate the velocity interval excluded in this analysis (ν_source  ±  3 km s^-1) and the dotted lines illustrate the high-velocity intervals less affected by filtering. The horizontal line (green) is the baseline.