\begin{table}%t1
\caption{Previous variable star searches in NGC~6791.}
\label{tabprevious}
\small%\centering
\par
\begin{tabular}{lrll}
\hline \hline
 Authors                                                  & Nr. of variables & IDs & Notes \\
\hline
Kaluzny \& Rucinski (\cite{kaluzny93}) (KR93)             & 17  &  V1--V17                             & V15~$\equiv$~B7                                                                                             \\
Rucinski et~al. (\cite{rucinski96}) (RK96)  & 5   &  V18--V21 and B8		      &   \\
Mochejska et~al. (\cite{moch02}) (M02)                    & 47  &  V22--V67 and B4                     & B4 was previously catalogued by \\
 & & & Kaluzny \& Udalski (\cite{kaluzny92}) as \\
 & & & a blue star, but not as variable.  \\
Mochejska et~al. (\cite{moch03}) (M03)                    & 7   &  V68--V74			      &														   \\
Kaluzny (\cite{kaluzny03}) (K03)                          & 4   &  V75--V78			      &														   \\
Bruntt et~al. (\cite{bruntt03}) (B03)                     & 19  &  V79--V100                           & V85~$\equiv$~V76; V56~$\equiv$~V96; V77~$\equiv$~V88								   \\
Mochejska et~al. (\cite{moch05}) (M05)                    & 14  &  V101--V114			      &														   \\
Hartman et~al. (\cite{hartman05})                         & 10  &  V115--V124                          & Plus 7 suspected variables\\
\hline
\end{tabular}
\end{table}