Residuals from the pixel-per-pixel fitting assuming that the QSO emission is not spatially resolved. Left panels: residual spectra extracted from a region of 0.25′′× 0.25′′, where the residual map, obtained by collapsing the [Oiii]λ5007 spectral channel, probably shows a spatially resolved emission. Dashed lines indicate the wavelength of the doublet [Oiii]λ5007, and the dotted line shows the Hβ position. The red shaded region denotes the wavelength range over which the residual [Oiii]λ5007 emission has been integrated to produce the maps shown on the right. Right panels: residual maps obtained by collapsing the spectral channels corresponding to the residual [Oiii]λ5007 emission, as shown by the red region in the left panels. In the first five maps the clear [Oiii]λ5007 residual emission suggests that the emitting region is spatially resolved. The “noise” residual map of HE0251 indicates that the sources are not resolved.