Anomalous spectra in the SW region. The greyscale displays the Spitzer/IRAC 8 μm emission, and the yellow contours the NH₃ (1, 1) integrated emission. Blue dots mark the positions of the anomalous spectra. These spectra are shown in the smaller boxes outside the map. Offsets are indicated in the top right corner of each spectrum. The observed spectra are in black and the fitting in red. The T_MB scale has been chosen to improve the visibility of satellite lines.