Velocity position diagrams of the H₂CO(3_0,3−2_0,2), HDCO(4_1,4−3_1,3), D₂CO(4_0,4−3_0,3), and C¹⁸O(3 − 2) lines along the declination axis at Δα = 0′′. The molecule is indicated in each panel. The C¹⁸O(3 − 2) data are from Liseau et al. (2010). The vertical scale in each panel indicates the declination offset and the horizontal scale is the v_LSR velocity. The intensity scale in all four panels is T_mb.

Ortho H₂CO(3_1,2−2_1,1) and (3_1,2−2_1,1) spectra at declination offsets  − 30″ (bottom, D-peak), 0″ (middle) and  + 30″ (top, P1). The offsets are relative the center position in Fig. 1. The  spectra (in colour) have been scaled up with a factor of 10 and appear much more noisy.

SO(5₆−4₅) and (6₅−5₄) map spectra toward the ρ Oph A cloud. The  spectra (in colour) have been multiplied with a factor of 5. Scales as in Fig. 2.