The OMC-1 core ¹³CO J = 3−2 integrated intensity [+5,  +15] km s^-1 image overlaid with the C¹⁸O J = 3−2 [+4,  +12] km s^-1 contours running from 24 to 80 K km s^-1 in steps of 8 K km s^-1. The ¹³CO J = −2 (black) and C¹⁸O J = 3−2 (red) spectra are shown for Orion BN, Orion South, Orion Bar, and Orion East at the same positions as in Fig. 1. The black stars mark the positions of the five Trapezium stars. The beam size of 211 is shown at the bottom left of the image.