PEP results for a MHD clump, using the T_kin value given in frame a. Each frame shows χ² for one molecule and its first three rotational transitions. The cyan circles indicate the beam-averaged model mean densities and column densities (sizes in order of increasing FWHM). The χ² values are based on the medium beam size. The blue, cyan, magenta, and red contours correspond to χ² = 1, 2, 10, and 100.