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Fig. 4

image

Upper panels: rotational diagrams of methanol (CH3OH) in outflow SE, SW, and North (from left to right). Lower panels: rotational diagrams of acetaldehyde (CH3 CHO) in outflow SE, SW, and North. The parameters Nup, gup, and Eup are the column density, the degeneracy, and the energy of the upper level. The error bars on ln (Nupgup) are computed by taking the calibration error on the integrated flux (15%) into account. The red lines represent the best fits.

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