Channel maps of D₂CO 231.41 GHz emission toward IRS 63. The black contours show the continuum emission at 1.3 mm (contours from 10σ with steps of 500σ, with σ = 0.7 mJy beam⁻¹). The scale of the wedge is in Jy beam⁻¹. In each panel the velocity, V_LSR, is indicated on the top-left (channel width of 0.158 km s⁻¹ channel). The beam and the wedge of the color scale are drawn in the last channel.