Integrated intensity maps of the observed transitions. The dashed black lines represent 90, 50, and 30% of the H₂ column density peak value derived from Herschel maps (Spezzano et al. 2016), 2.8 × 10²² cm⁻². The solid lines represent contours of the integrated intensity starting at 3σ with steps of 3σ. From top to bottom and left to right, the average errors on the integrated intensity are 9, 9, 12, and 8 in units of mKkm s−¹. The dust peak is indicated by the black triangle. The beam size of the 30 m telescope, HPBW = 31″, is shown by the red circle in the bottom left corner of each panel, and the scale bar is shown in the bottom right corners.