Transitions of CH₃CONH₂ used to calculate the 3σ upper limits given in Table 9. In each panel, the green trace shows the transition simulated using the derived upper limit column density and the physical parameters assumed for that source. The dotted line in each panel indicates the 3σ noise level. The quantum numbers and upper-level energies for each transition is shown in the lower right of each panel. The source name is given in the upper left of each panel. Due to the large variances between observations, the intensity and velocityaxes are not necessarily uniform between each panel.