Best fitting gas kinetic temperature and ¹³CO column density ranges for the observed integrated intensities towards C1-N (left), F1 (centre), and F2 (right) based on RADEX modelling. The solid yellow, red, and blue lines show the models where the integrated intensities of the ¹³CO J = 2 → 1, C¹⁸O J = 2 → 1, and ¹³CO J = 3 → 2, respectively, were within 5% of the observed values. The dashed yellow, red, and blue lines show where the models were within 25% of the observed integrated intensities of the above three lines individually. The solid black ellipse shows the 1-sigma uncertainty range for models that match all three lines, found by the locus of models with a χ² value within 1 of the best fitting model. The black cross indicates the best fitting model. The solid horizontal purple line gives the ¹²CO J = 3 → 2 derived temperature while the dashed purple lines give the uncertainty on this temperature.