Upper panel: spectra of the best fitting templates determined at different radial bins (along the major axis of the host galaxy at PA = 62°; 3′′<R< 10′′, NE side of the galaxy. See the slit orientation shown in Fig. 1). The average of these spectra is shown in black (shifted by −0.2 for clarity purposes); it is be used as template spectrum for the host galaxy in the spectroscopic decomposition (see text for details). Lower panel: deviations of the templates from the mean spectrum.