Important emission lines observed in HD 155448 C, extracted from spectra obtained in an east-west slit orientation. The upper panel displays the extracted spectral line, the middle panel shows the position-velocity diagrams in the raw 2D spectrum, while the lower panels expose the position-velocity diagrams after the subtraction of the continuum PSF. The first (outer) contour represents the 5σ level with respect to the background noise. Subsequent contours are at 10σ intervals, except for Hα, which is composed of 30σ intervals.