Rotation diagram for CH3OH lines in comet C/2001 Q4 (NEAT) which includes 1-σ uncertainties. The natural logarithm of the column density of the upper level divided by its degeneracy is plotted against the energy of the upper level for the AOSA (blue circles), AOSB (red squares), and CTSB (black triangles). The solid line shows the best linear fit with a derived rotational temperature of 54(9) K to the lines detected by all the spectrometers with S/N greater than three.
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