NH₃ (3, 3) observations in the south-western part of the field. Two positions (the NH₃ and the CO peaks) have been observed, indicated above the boxes. The (1, 1) and (2, 2) spectra towards the same positions are also plotted for comparison. Note that the (1, 1) intensity scale is reduced by a factor of two, and the (3, 3) spectra are multiplied by 20. The (3, 3) spectrum towards the CO peak has been smoothed to 0.7 km s^-1. Dashed vertical lines are plotted at +0.3 and +1.9 km s^-1 to facilitate further comparisons among the lines, and to separate the three components present in the (3, 3) line towards the NH₃ peak.