Velocity channel maps from top to bottom: for ¹²CO 2-1, 3-2, ¹³CO 2-1, C¹⁸O 2-1 and HCO⁺ 3-2. The channels corrupted by the CO clouds along the line of sight are marked with a red cross. These channels were not used in the DiskFit analysis. All the maps are rotated by −73.5°. The contours are defined as follows: from 3 to 12 K in steps of 3 K (i.e., 3.6σ) for the ¹²CO 2-1, 3.3σ for ¹²CO 3-2, and 3.6σ for ¹³CO 2-1; from 2 to 6 K in steps of 2 K (i.e., 3.2σ) for C¹⁸O 2-1; and from 3 to 9 K in steps of 3 K (i.e., 3.3σ) for HCO⁺ 3-2.