Single-dish moment 0 maps of the ¹³CO (2–1) and (3–2) emission (panels a and b) and the C¹⁸O (2–1) and (3–2) emission (panels c and d) integrated over different velocity ranges. Grayscales present the integrated intensity in the velocity range close to the velocity of the intensity peak V_LSR = 6.2–7.1 km s⁻¹. Blue and red contours present the integrated intensity at the higher relative velocities with respect to the peak velocity, V_LSR < 6.2 km s⁻¹ and V_LSR > 7.1 km s⁻¹, respectively. Contours are from 3σ and increase in steps of a factor of two. 1σ levels of the integrated blue- and redshifted emission are 0.09 and 0.11 K km s⁻¹ in panel a, 0.11 and 0.1 K km s⁻¹ in panel b, and 0.04 and 0.07 K km s⁻¹ in panel c. Inthe C¹⁸O (3–2) line, there is no clear emission detected at the blueshifted high velocity, and the 1σ level of the integrated redshifted emission is 0.1 K km s⁻¹.