2₀₂ − 1₁₁ emission map at 988 GHz integrated from 7.7 to 13.5 km s⁻¹. Contours represent the emission of ¹³CO 6− 5 at 95, 90, 75 and 50% of the maximum intensity, integrated from 2 to 17 km s⁻¹, observed with the CSO at a resolution of 11′′. Black star marks the CO⁺ peak position, white circles show the HIFI HPBW at the extreme frequencies, black and magenta disks show the CSO and 988 GHz HIFI beam width (see Table 1). FUV field from the Trapezium cluster comes from the upper right corner.