Apertures used for extracting spectra from the observed and synthetic channel maps. The ellipses labelled A through E represent each of the clumps, and the big circle is the general emission area. Areas A, B, C, and general are also used for the rotational temperature diagram (see Appendix D). The background is the zeroth moment map of the NaCl J = 26 → 25 transition, where yellow (blue) is the highest (lowest) intensity, and the white ellipse is the beam.