Microjet of Sz 103. The three UVES slit position angles are indicated as solid lines. For each slit position the spectro-astrometric offset in the [OI]λ6300 emission line is indicated as filled circle together with their 1σ error bars (thick lines). We determined its position by calculating the mean of all offsets (1D Gaussians) with respect to the continuum between v = −80 … 10 km s⁻¹ (see Fig. D.11). We interpolated a quadratic curve that connects the mean detected positions of the spectro-astrometric offsets. It thus represents a lower limit of the extension of the microjet.