Upper panel: fitted CH₃OH spectrum in IRS1-mmS. The black histogram is the observed spectrum, overlaid with the red fit whose parameters are listed. Blue lines mark transition frequencies at 217.299 GHz, 217.643 GHz, 217.886 GHz. Lower left panel: line profiles of CH₃OH transitions from the IRS1-peak; right panel: corresponding intensity maps integrated over the velocity range from −63 to −53 km s^-1 (V_lsr ~ −58 km s^-1 at the continuum peak). The red crosses mark the IRS1-peak position and IRS1-mmS, and the yellow solid (dashed) contour shows ± 4σ rms level.