\begin{table}%t4
\caption{Coordinates and light curve parameters of the contact binaries (W UMa systems, EW)
 belonging to NGC~6791. $V$ is the brightness at maximum
and  $T_0$ is the time of the primary minimum.}
\small%\centering
\par
\begin{tabular}{l ll ccc l ll ll}
\hline \hline
\noalign{\smallskip}
\multicolumn{1}{l}{Star} &
\multicolumn{1}{l}{$\alpha_{2000}$}&
\multicolumn{1}{l}{$\delta_{2000}$}&
\multicolumn{1}{c}{$V$} &
\multicolumn{1}{c}{$\langle B-V\rangle$} &
\multicolumn{1}{c}{$\langle V-I\rangle$} &
\multicolumn{1}{l}{Ref.} &
\multicolumn{1}{l}{$T_0$}&
\multicolumn{1}{l}{Period}&
\multicolumn{1}{l}{Ampl.} &
\multicolumn{1}{l}{Notes}  \\
 & & & [mag] &[mag] & [mag] & &
\multicolumn{1}{l}{[HJD-2~452~400]}&
\multicolumn{1}{l}{[d]}&
\multicolumn{1}{l}{[mag]} &  \\
\hline
  01441\_8  &   19.339422 &  37.778118 &   19.98 &    1.38  &         &    k & 63.073  &    0.24544 &  0.07 &         likely memb.  \\
      V118  &   19.347500 &  37.651222 &   17.68 &    0.75  &    1.01 &    s & 59.912  &    0.30623 &  0.70 &         likely memb.  \\
        V5  &   19.346258 &  37.813354 &   17.19 &    0.90  &    0.95 &    k & 60.221  &    0.31274 &  0.05 &        member (98\%)  \\
        V3  &   19.354380 &  37.769349 &   18.51 &    1.05  &    1.06 &    k & 59.798  &    0.31764 &  0.09 &        member (78\%)  \\
        V4  &   19.348396 &  37.806652 &   17.72 &    1.01  &         &    k & 59.591  &    0.32568 &  0.10 &        member (98\%)  \\
        V8  &   19.341938 &  37.865810 &   17.81 &    0.79  &    0.88 &    k & 59.896  &    0.33406 &  0.10 &         likely memb.  \\
      V117  &   19.343433 &  37.665848 &   17.66 &    0.87  &    0.90 &    k & 59.987  &    0.36644 &  0.38 &         likely memb.  \\
        V7  &   19.340271 &  37.821892 &   17.63 &    0.93  &    0.86 &    k & 59.820  &    0.39174 &  0.31 &         likely memb.  \\
\hline
\label{ewbel}
\end{tabular}
\end{table}