Spectral energy distribution integrated over the region observed with IRAM-PdB, excluding the region with the UV bright nuclear disc (Lauer et al. 2012). As described in Sect. 4.2.1, we integrate over this region each photometric map available in this region after being reprojected on the 24 μm Spitzer map and convolved to a 7 arcsec FWHM Gaussian (Aniano et al. 2011). The star symbols correspond to the values thus achieved for each survey, while the crosses represent the same measurements after a Galactic extinction correction (E(B − V) = 0.05). The integrated IRS spectra from Hemachandra et al. (2015) and the passive template from Panuzzo et al. (2011) are shown in grey. Last, we superimpose different stellar templates from Bressan et al. (1998) and Fioc & Rocca-Volmerange (1999), as well as a 4000 K black body. We show that GALEX points support solar metallicity templates, with a small contribution of a young stellar population (200 Myr).