Distance vs. velocity plot of CH₃OCHO imfit data points, using Cycle 3 data only, in linear scale (top frame) and logscale (bottom frame). The velocities on the first axis are the velocity offset from the employed systemic velocity (6.0 km s⁻¹). The blue- and redshifted imfit data points of the CH₃OCHO emission areshown in blue and red, respectively. The data diverging from the model velocity profiles at low velocities, below ~ 4 km s⁻¹, arise from the projected rotational gas motions at the edge of the emission region. Both frames are overlaid with the best fit infall (dashed line) and Keplerian velocity profile (full line) to the Cycle 3 CS J = 7–6 and H¹³CN J = 4–3 data.