XCLASS fitting for CH₃CN in the hot core. The panels show: integrated intensity in the CH₃CN 12₄ −11₄ transition (top-left); column density of CH₃CN (top-middle); excitation temperature (top-right); peak velocity (bottom-middle); FWHM (bottom-right); example spectra (black) and  XCLASS model fits (bottom-left) for CH₃ CN (red), CHCN (cyan), and HNCO (blue). As k = 0−3 of CH₃ CN were notincluded in the fit, the resulting fit solution for those transitions is shown with a dashed line. The data were imaged with an intermediate weighting between uniform and natural in order to provide a good balance between sensitivity and resolution, resulting in a beam size of 0.67′′ × 0.56′′ (PA = −83.2°), as shown in the top-left panel with a scale-bar, and converted to the T_mb scale. The black contours in the maps show the continuum at the same resolution as the line data, starting at 5σ and increasing to 45σ in 10σ steps (σ = 0.48 mJy beam⁻¹). The spectra are extracted at the continuum peak, which is indicated in the top-left panel with a red square. All maps are clipped to show only results where the integrated intensity of the CH₃ CN 12₄ −11₄ is above 5σ (σ = 1.27 K kms). The purple arrow indicates the suggested direction of the outflow as in Fig. 9, while the green dashed line is perpendicular to this axis.