Close-up of the integrated spectrum of the LIRG IRAS F12115-4656. The top-red line corresponds to the spectrum obtained by integrating the VIMOS spaxels within a simulated circular fixed-aperture of 10 arcsec centred on the nucleus of the galaxy in the IFS data cube without any velocity-field correction. The central spectrum in black corresponds to the S/N continuum-optimized integrated spectrum of the same galaxy, some spectral features being labelled for easy identification. The blue spectrum at the bottom corresponds to a simple SSP synthetic model fitted to the S/N-optimized integrated spectrum, as described in the text. All spectra are displayed in a relative flux scale.