SIMBAD references

We present an intrinsic AGN spectral energy distribution (SED) extending from the optical to the submm, derived with a sample of unobscured, optically luminous (νL_ν,5100 > 10^43.5 erg/s) QSOs at zL_ν, 5100_ or >= 10^43.5 erg/s). We note that for our sample of luminous QSOs, the average AGN emission is at least as high as, and mostly higher than, the total stellar powered emission at all wavelengths from the optical to the submm. This implies that in many galaxies hosting powerful AGN, there is no 'safe' broad-band photometric observation (at λ L_IR, 8-1000 µm) of the galaxy. Finally, we examine the implication of our work in statistical studies of star formation in AGN host galaxies.