Fit results for the parameters δ and K₀/L of our models with re-acceleration in core-collapse SNRs. Results are shown for E_min =  2, 5, and 10 GeV nucleon^-1 (top to bottom), for the SNR models CC # 1, # 2, and # 3 of Table 2 and for the reference model (left to right). The shaded areas represent the 1-, 2-, and 3-σ contour limits. The markers “ × ” indicate the best-fit parameters for each configuration; the χ²/d.f. ratio is reported in each panel.