Rotational temperatures for a) H₂CO; b) CH₃OH; and c)c-C₃H₂ as functions of distance to R CrA. Upper limits are shown in grey. In the H₂CO plot, CrA-24 and SMM 2 have two data points each, one for the on-source component (blue) and one for the outflow component (red), and the same applies to the CH₃OH plot when the rotational temperature could be measured. The CH₃OH rotational temperature most likely does not reflect a physical temperature due to non-LTE excitation in combination with few data points. (A colour version of this plot is available in the online Journal.)