\begin{table}%t2
\caption{CCD $CT_1$ data of stars in the field of NGC~2324.}\label{ct1}
%\centerline
{
\begin{tabular}{crrccccc}
\hline\hline
Star & $X$\hspace{0.2cm} &  $Y$\hspace{0.2cm} & $T_1$  & $\sigma(T_1)$  & $C-T_1$ & $\sigma(C-T_1)$  & $n$ \\
   & (pixel)   & (pixel) &  (mag)  &  (mag)  &  (mag)  &  (mag)  &   \\
\hline
   504 &1092.721 & 606.557 & 15.289 &0.041 & 0.444 &0.055 & 2\\
   505 & 355.151 & 606.785 & 17.545 &0.017 & 2.053 &0.102 & 2\\
   506 & 911.616 & 608.781 & 13.975 &0.004 & 0.731 &0.009 & 2\\
   507 &1480.182 & 610.937 & 17.352 &0.021 & 1.296 &0.010 & 2\\
   508 & 844.170 & 611.209 & 15.450 &0.012 & 1.444 &0.037 & 2\\
.  & .\hspace{0.5cm} & . \hspace{0.2cm} & .  & . &  .    &    .    &  .  \\
.  & .\hspace{0.5cm} & . \hspace{0.2cm} & .  & . &  .    &    .    &  .  \\
.  & .\hspace{0.5cm} & . \hspace{0.2cm} & .  & . &  .    &    .    &  .  \\
\hline
\end{tabular}}
\medskip
{\sc NOTE:} ($X$, $Y$) coordinates correspond to the reference system of Fig.~\ref{fig1}. Magnitude and colour errors are the standard deviations of the mean, or the observed photometric errors for stars with one \mbox{measurement}.
\end{table}