Channel maps of the uniform weighted ¹²CO(2−1) SSC image cube. The size of the displayed channel maps is 22′′  by 22′′, which is the size of the primary beam of the PdBI observations. The contours are at −3σ, 3σ, 5σ, 10σ, 15σ and 25σ, with 1σ = 2.8 mJy beam^-1. The velocity relative to the systemic velocity of the galaxy (v_sys = 1153 km s^-1) is indicated in the upper left corner. The phase center of the observations is indicated by a cross in each channel map. The clean beam (0.62′′  by 0.34′′) is shown in the lower left corner of each channel map and the dirty beam is shown in the lower right panel.