Methanol integrated-emission maps (corrected from the primary beam attenuation). Top left: E₂ -CH₃OH integrated intensity emission map over the line profile. The first contour is at 3σ and the levelstep at 1σ (where 1σ = 1.9 mJy beam⁻¹ km s⁻¹). Top right: CH₃OH-E moment-zero maps from the combined IRAM-30 m and NOEMA data. The first contour is at 5σ and the levelstep at 1σ (where 1σ = 4.5 mJy beam⁻¹ km s⁻¹). Middle left: A⁺–CH₃OH integrated-intensity emission map over the line profile. The first contour is at 3σ and the levelstep at 1σ (where 1σ = 1.9 mJy beam⁻¹ km s⁻¹). Middle right: A⁺–CH₃OH moment-zero maps from the combined IRAM-30 m and NOEMA data. The first contour is at 5σ and the levelstep at 1σ (where 1σ = 6.3 mJy beam⁻¹ km s⁻¹). Bottom left: E₁–CH₃OH integrated-intensity emission map over the line profile. The first contour is at 3σ and the levelstep at 1σ (where 1σ = 1.6 mJy beam⁻¹ km s⁻¹). Bottom right: E₁–CH₃OH moment-zero maps from the combined IRAM-30 m and NOEMA data. The first contour is at 1σ (2.6 mJy beam⁻¹ km s⁻¹).