CO channel maps of the central region of the Circinus galaxy. The velocity range is given at the top, and the nuclear position of the Circinus galaxy is labeled by white crosses. Beam sizes are shown in the panels at the left hand side. Upper panels: ¹²COJ = 6 → 5 channel maps. The contours are from 0.1 (2σ) to 0.5 K with a spacing of 0.1 K. Middle panels: ¹²COJ = 4 → 3 channel maps. The contours are –0.1 (dotted) and 0.1 to 1.0 Kkms^-1, the latter with a spacing of 0.1K. The 3σ noise level corresponds to 0.1 K. Lower panels: ¹²COJ = 3 → 2 channel maps. The contours are the same as for ¹²COJ = 4 → 3. The 5σ noise level corresponds to 0.1 K.