Color maps of the velocity integrated intensity (in the range 0–40 km s^-1) of the J = 1 → 0 and J = 2 → 1 transitions of CO (top panels) and CO (bottom panels) in M17 SW. Only the CO J = 1 → 0 line was integrated between 14 and 28 km s^-1 because it is fainter and noisier than the other lines. The contour levels are 25%, 50% (thick contour), 75%, and 90% of the peak emission. All maps have been convolved to the larger beam (24′′) of the CO J = 1 → 0 line. The reference position (Δα = 0, Δδ = 0) and symbols are as in Fig. 2.