Parametric fits of the [Ar II] line profile from the spectrum extracted as a point source. Fits are (left to right) with one, two, and three Gaussians plus a local continuum. The top panel shows the total fit and the individual Gaussians and the bottom the residuals of the fit. The vertical lines in the main panel indicate the continuum regions and the horizontal lines in the bottom panel ±3×s_cont, where s_cont is the local continuum standard deviation. The corresponding parameters of each fit are listed in Table A.1.