Channel maps of the ¹²CO J = 1−0 and J = 2−1 line emission toward χ Cyg at the LSR velocities (units of km s^-1) specified in the top-left corner of each panel. No primary beam attenuation correction is applied. (Top) CO J = 1−0: contours are plotted from 4σ, with a spacing of 8σ, where σ = 10 mJy beam^-1. In the panels marked with c in the bottom-left corner the first four contours are at 4, 12, 20 and 28σ, and from there the spacing is 20σ. Equivalent negative contours are plotted in dashed lines. The last channel presents the continuum emission with a first contour and contour spacing of 3 and 6σ respectively, where σ = 0.4 mJy beam^-1. The synthesized beam, plotted in the bottom-right corner of last panels, is in size, with PA 69°. (Bottom) CO J = 2−1: contours are plotted from 6σ, with a spacing of 10σ, with σ = 22 mJy beam^-1. In the panels marked with c1 in the bottom-left corner an additional contour is plotted at 3σ. In the panels marked with c2 in the bottom-left corner the first two contours are at 6 and 16σ, from there the spacing is 15σ. Equivalent negative contours are plotted in dashed lines. The last panel presents the continuum emission with a first contour and a contour spacing of 4σ, with σ = 1 mJy beam^-1. The synthesized beam, plotted in the bottom-right corner of last panels, is 1″̣5 × 1″̣4 in size, with PA 28°. The primary beams are plotted at half power, in dotted lines, in the last panels of the channel maps. The central coordinates are RA 19:50:33.907, Dec 32:54:50.40 (J2000).