Top panel: posterior probability distributions of the physical parameters derived for object CDFS020583 at z = 3.5. From left to the right we show the logarithmic mass in units of solar masses, the logarithmic metallicity in units of solar metallicity, the dust attenuation coefficient, the age, and the logarithmic specific SFR. The gray bands are the 1σ confidence intervals. The red crosses are the 1σ confidence intervals obtained without the prior on the metallicity. The different blue contours indicate the 1σ, 2σ, and 3σ confidence levels. Bottom panel: spectral energy distribution of the same galaxy. The blue points are the photometric observations, and the orange shaded regions are the 68% confidence intervals derived by BEAGLE. The black solid lines are ten of the theoretical SEDs with the highest likelihood values.