Spectral index map of G040.5-0.5 in the 0.155-1.284 GHz frequency range from SMGPS and GLEAM images with superposed contour levels of the ¹² CO (blue lines) and TeV emission from VERITAS (yellow lines). The ¹²CO emission is integrated on the −100 − 200 km s⁻¹ velocity interval and the contours correspond to the temperature levels at 4.6, 5.06, 5.52, 6.9, 9.2, 13.8 K. The TeV contours correspond to the significance levels at 3.65, 3.74, 3.83, 4.02, 4.38, 5.48.