\begin{table}%t3
\caption{$\alpha_{\rm inj}$ values relating to the minimum total energy of the jet for two
different values of $\gamma_{\rm i,max}$, and the
corresponding "best solution'' of age for the analyzed sample of FR~II-type radio galaxies.}\label{t:3}
\small%\centerline
{\begin{tabular}{lcccccccc}
\hline\hline\noalign{\smallskip}
  &   $\gamma_{\rm max}=10 ^{7}$ &&
    $\gamma_{\rm max}=3 \times 10^{8}$  \\
Source & $\alpha_{\rm inj}$ & $t$[Myr] & $\alpha_{\rm inj}$ & $t$[Myr] & $\Delta t/\overline{t}$
 & $\alpha_{\rm CI}$ & $\tau_{\rm rad}$[Myr] & $t/\tau_{\rm rad}$\\
1 & 2 & 3 & 4 & 5 & 6* & 7** & 8*** & 9 \\
\hline
Cyg~A  & 0.607 & 6.78 & 0.618 & 5.94 & 0.09 & $0.571\pm 0.023$ &$ 6.4\pm1.4$ & 1.01\\
3C55    & 0.628 & 26.7 & 0.632 & 24.1 & 0.07 & $0.630\pm0.060$ &$ 9.4\pm1.6$ & 2.84\\
3C103   & 0.576 & 42.8 & 0.589 & 36.5 & 0.11 & $0.617\pm0.099$ &$10.6\pm1.4$ & 4.04\\
3C165   & 0.557 & 80.5 & 0.580 & 64.5 & 0.16 & $0.523\pm0.051$ & $41\pm5$    & 1.96\\
3C239   & 0.673 & 2.88 & 0.678 & 2.72 & 0.04 & $0.716\pm0.033$ &$2.34\pm0.15$& 1.23\\
3C247   & 0.546 & 1.67 & 0.570 & 1.31 & 0.17 & $0.599\pm0.021$ &$1.35\pm0.15$& 1.24\\
3C280   & 0.560 & 2.61 & 0.575 & 2.22 & 0.11 & $0.694\pm0.031$ &$2.52\pm0.2 $& 1.04\\
3C292   & 0.566 & 38.1 & 0.577 & 36.0 & 0.04 & $0.782\pm0.049$ &$ 8.4\pm2   $& 4.54\\
3C294   & 0.683 & 3.65 & 0.686 & 3.48 & 0.03 & $0.898\pm0.067$ &$2.85\pm0.1$ & 1.28\\
3C322   & 0.557 & 4.00 & 0.569 & 3.93 & 0.01 & $0.624\pm0.041$ &$3.65\pm0.3$ & 1.10\\
3C330   & 0.543 & 6.55 & 0.563 & 5.26 & 0.15 & $0.580\pm0.039$ &$10.1\pm1.5$ & 0.65\\
3C332   & 0.528 & 35.7 & 0.555 & 26.1 & 0.22 & $0.620\pm0.040$ & $23.5\pm4.5$& 1.52 \\
B0908+376 & 0.514 & 19.1 & 0.543 & 12.6 & 0.29 &$0.548\pm0.082$ & $14\pm2.5$ & 1.36\\
B1209+745 & 0.512 & 151.3& 0.539 & 128.8& 0.11 &$0.764\pm0.042$ & $81\pm15 $ & 1.87\\
B1312+698 & 0.506 & 112.3& 0.536 & 88.8 & 0.17 &$0.639\pm0.035$ & $41\pm8  $ & 2.74\\
\hline
\end{tabular}}
\smallskip
* The ratio of the standard deviation to the mean of the ages in Cols.~3 and 5; ** $\alpha_{\rm inj}$ value fitted for the C.I. model using the {\sc SYNAGE} package of Murgia 
(\cite{murgia}); *** the synchrotron (radiative) age of the sources compiled from the literature.
\end{table}