Correlation plots for Weeds model parameters. Panel a: Velocity offset, υ_off, from the systemic velocity (υ_sys = 62 km s⁻¹) versus rotational temperature, T_rot. Panel b: υ_off versus linewidth, ∆υ (FWHM). Panels c–d: T_rot versus ∆υ (FWHM). Colours signify the same as in Fig. 7. Markers showing |υ_off| values larger than 7 km s⁻¹ in (a) and (b) correspond to the blue- and red-shifted components at positions N1SE1 (filled markers) and N1NW3 (empty markers), respectively. In panels c and d empty markers present the hot-core component at N1SE1 and N1NW3, respectively. Uncertainties on the temperature values are taken from the results of the population diagrams. Arrows indicate upper limits.