\begin{table}%t2
\caption{\label{t1}Standard magnitudes and colour indices of the comparison and check stars.}
%\centering
\small
\begin{tabular}{llllll}
\hline
\hline
      &  $V$ & $U-B$ & $B-V$ & $V-R_{\rm C}$ & $V-I_{\rm C}$  \\
\hline
GSC 5002--0506 & $11.500\pm .024$ & $0.021\pm .005$ & 
                          $0.534\pm .004$ & $0.336\pm .001$ & $0.664\pm .002$ \\
GSC 5002--0525 & $13.524\pm .026$ & $0.156\pm .025$ & 
                          $0.655\pm .005$ & $0.384\pm .004$ & $0.764\pm .004$ \\
GSC 5002--0566 & $12.925\pm .025$ & $0.052\pm .017$ & 
                          $0.549\pm .005$ & $0.329\pm .004$ & $0.668\pm .008$ \\
\hline
\end{tabular}
\end{table}