\begin{table}%T2
%\centering
\small
\caption{\label{res}X-ray luminosity (0.2$-$2.0~keV) in $10^{26}$~erg/s determined from XMM-Newton data
for 61~Cyg A and B.}
\begin{tabular}{lcc}\hline\hline
Obs. date& $L_{\rm X}$ (A) & $L_{\rm X}$ (B)\\\hline
2002-05-14 & $19.5 \pm 0.8$ & $7.6 \pm 0.5$\\
2002-11-17 & $19.3 \pm 0.8$ & $6.9 \pm 0.4$\\
2003-05-12 & $18.2 \pm 0.7$ & $7.2 \pm 0.5$\\
2003-11-22 & $16.9 \pm 1.0$ & $6.2 \pm 0.6$\\
2004-05-01 & $11.2 \pm 0.3$ & $6.5 \pm 0.4$\\
2004-11-02 & $8.3 \pm 0.6$ & $6.0 \pm 0.4$\\
2005-04-23 & $8.6 \pm 0.4$ & $6.5 \pm 0.4$\\
2005-11-05 & $7.4 \pm 0.5$ & $8.0 \pm 0.5$\\
\hline
\end{tabular}
\end{table}