SFH for the four mass bins of our sample, with mass increasing from top to bottom (in the case of BC03 models). Colored vertical lines are the SFR (M_⊙ yr^-1) derived from the m_j provided by the spectral fitting (colours are coded as in Fig. 10). In each mass bin, black vertical and horizontal lines are defined as in Fig. 13. In each panel, we show the two best fit models deriving from the assumption of an Expdel (dotted curves) or an Expdelc (solid curves) parametric function to describe the derived SFHs. The best fit parameters are also reported. Pink curves are the inverted-τ models with τ = 0.3 Gyr described in the text, extended up to 13.48 Gyr (which corresponds to the age of the Universe in the assumed cosmology).