Plots of the integrated intensity for different CH₃OH 7_K → 6_K transitions and the best χ² model values. In the panels the observed flux (open symbols) is plotted, as well as the non-LTE model values (plusses and crosses). Also indicated is the 3σ detection limit. Circles and plusses (blue) are used for E-type lines and squares and crosses (red) for A-type. Labels on the top identify blended lines, for which the combined flux and model value are displayed. The K =  + 1 line which is blended with an SO₂ was not included in the analysis for the centre region components (top panels). The parameters of the fits are listed in Table 3. a) main,  − 10.5 km s^-1 velocity component at the “Centre” position with beam dilution factor of 1, b) redshifted,  − 5.2 km s^-1 velocity component at “Centre” with a beam dilution factor of 50, c) the “NE Outflow” and d) “Envelope”.