Brightness temperature for the ¹³CO J = 2–1 (top panels) and C¹⁸O J = 2–1 (bottom panels) transitions in six representative velocity channels. Channel velocities with respect to the systemic velocity of v_lsr = 5.9 km s⁻¹ are listed in the top right corner of each panel and the channel width is 0.16 km s⁻¹. All channelsare shown in Figs. B.1 and B.2. The continuum peak position is marked with a cross and the beam is shown in the lower left corner of the left panels.