The line brightness of p - H₂CO3_0,3−2_0,2 (top row) and p - H₂CO3_2,1−2_2,0 (middle row) and p - H₂CO S_ν(3_2,1−2_2,0) /S_ν(3_0,3−2_0,2) (bottom row) in the three different projections of parameter space. The grayscale images correspond to a slice through the parameter spaces at the location of the best-fit parameter. The colored contours show the allowed marginalized regions in each parameter space as described in the Fig. D.1 caption.