Left panel: grey-scale map of the summed integrated intensity (units of ) of the 2_0,2 − 1_0,1 (A⁺) and 2_1,2 − 1_1,1 (E₂) CH₃OH lines (30′′ angular resolution). Five equally spaced contours from 0.23 to 1.5 K km s^-1 are plotted. The blue dashed contours plot the 1.3 mm continuum intensity map of Ward-Thompson et al. (1999) smoothed at 22′′ to improve the signal-to-noise ratio. Contours are at 100, 140, 180, and 220 mJy flux density levels. The red crosses represent the offset positions at which the spectra have been extracted. Right panel: map spectra of the CH₃OH transitions towards the nine red crosses shown in the left panel. The velocity axis is centred on the 2_0,2 − 1_0,1 (A⁺) line at 7.2 km s^-1. The vertical axis of each spectrum represents the scale in K, as shown in the lower leftmost panel.