Gaussian (red) and log-normal (blue) fits to the emission (black) in four different example positions at native spatial resolution. Note: the sign of the velocity scale has been changed and corrected w.r.t. υ_LSR in order to capture a lower limit on the infall velocity for each position. The log-normal fits generally provide slightly higher velocity estimates (vertical blue lines) than the Gaussian fits (vertical red lines). The σ level for each spectrum is indicated with a light grey dashed line and is calculated in the line emission free regions. Estimated velocities from the Gaussian fits for each of the spectra are indicated with red text. Note: the fit towards the central position is considered to be too poor for further analysis.