Spectral energy distribution for HD 163296. The green dots represent the fluxes corresponding to the UBVRIJHK photometry. The size of the dots is of the order or larger than the uncertainties. The IUE average spectrum and the FUSE+STIS spectrum are plotted in blue and red, respectively; the latter has been slightly smoothed to reduce the noise. The SpeX/IRTF spectrum is plotted in magenta. The black solid line is a photospheric model computed for the specific stellar parameters given in Table 3, reddened with E(B − V) =  + 0.15 and normalized at the flux in V. See text for details.