Results of the χ² minimization using the six observed lines of CH₃OH. For each of the three plots on the left, the χ² is projected over the third axis, which is not shown in the figure. Gray contours represent the 1σ, 2σ, and 3σ confidence intervals. The plot on the right represents the ratio of the observed and modeled integrated intensity for each of the methanol lines and the best model obtained by the χ² minimization.