Intensity maps (units of ) of the 2_0,2 − 1_0,1 (A⁺), 2_1,2 − 1_1,1 (E₂), and 2_0,2 − 1_0,1 (E₁) transitions of CH₃OH integrated over 0.5 km s^-1 velocity interval. The L1544 dust peak position located at α(J2000) = 05^h04^m17.21^s, δ(J2000) = +25°10′42.8′′ is indicated by the blue cross marker. The first contour is at 5σ and the increment is 5σ for all three maps; note however that the colour scale is different for the weak 2_0,2 − 1_0,1 (E₁) line (right panel). The images were smoothed to a 30′′ angular resolution to increase the signal-to-noise ratio (1σ ≈ 10^-2 K km s^-1).