Left: contour maps of CH₃OH 7₋₁ − 6₋₁ E and CH₃OH 7₀ − 6₀ A⁺ towards [GY92] 30. The contours start at 3σ and follow a step of 3σ (σ = 4 mJy beam⁻¹ km s⁻¹), representing velocities from −0.5 to 0.5 km s⁻¹. The dashed black contours show the continuum emission for values of 4 and 25σ. The yellow star indicates the position of the 2D Gaussian fit, and the synthesised beam is represented by the black filled ellipse. The dotted box represents the region from which the spectrum of Fig. A.2 is integrated. Right: spectra towards different positions marked on the contour maps. The grey dashed horizontal line represents a value of 3σ, and all the spectra are rebinned by a factor of 4. The dotted black vertical lines indicate the rest frequency of the two CH₃OH transitions.