Example of the spectral fitting with the pPXF and GANDALF routines. These H- (left) and K-band (right) spectra are from the nucleus of NGC 2110 (0.65′′  aperture). The black line represents the observed spectrum and the red line the best-fit returned by pPXF + GANDALF. This fit includes both the composite stellar spectrum and emission lines. The green line shows the residual (observation − fit). The blue line shows the combined emission line fit. This line has been offset from zero for better display. Shown is one spatial position, each spatial position in the H- and K-band spectra was fitted independently. A color version of this figure is available in the online journal.