Same as in Fig. 4, for the total M_V of the final spectrum (left), the BB temperature (middle), and the BB radius (right). All these parameters are degenerate with f_V that has the advantage of being independent of absolute quantities. As expected, the objects that are harder to classify are the ones that reach higher total luminosities, since they have a higher BB contribution. It is shown that the BB radius is more critical for the correct identification of the underlying event than the BB temperature, although a difference exists at T> 8500 K.