Table 3: ${\alpha }_{\rm {i}{n}{j}}$ values relating to the minimum total energy of the jet for two different values of ${\gamma }_{\rm {i},{m}{a}{x}}$, and the corresponding "best solution'' of age for the analyzed sample of FR II-type radio galaxies.
  $\gamma_{\rm max}=10 ^{7}$   $\gamma_{\rm max}=3 \times 10^{8}$          
Source ${\alpha }_{\rm {i}{n}{j}}$ t[Myr] ${\alpha }_{\rm {i}{n}{j}}$ 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
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
* The ratio of the standard deviation to the mean of the ages in Cols. 3 and 5; ** ${\alpha }_{\rm {i}{n}{j}}$ value fitted for the C.I. model using the SYNAGE package of Murgia (1996); *** the synchrotron (radiative) age of the sources compiled from the literature.

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