Zoom-out of H₂CO 218.22 GHz in the channels at V_LSR = [ + 1.79, +3.3] km s⁻¹ to show the emission by the large scale streamer. 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). In each panel the velocity, V_LSR, is indicated on the top-right (channel width of 0.168 km s⁻¹ channel). The beam and the wedge of the color scale are drawn in the last channel.