\begin{table}%T1
\caption{\label{VAROM2} Optical variability of PG 2112+059: OM fluxes.}
\small%\centering
\par
\begin{tabular}{lccccccc}
\hline
\hline
\noalign{\smallskip}
\multicolumn{1}{c}{Filter} & \multicolumn{1}{c}{Effective} &\multicolumn{4}{c}{Epoch} &
\multicolumn{1}{c}{Average flux}   & \multicolumn{1}{c}{Ratio} \\
\multicolumn{1}{c}{}        & \multicolumn{1}{c}{Wavelength}
& \multicolumn{1}{c}{2003--05}
& \multicolumn{1}{c}{2005--11}
& \multicolumn{1}{c}{2007--05}
& \multicolumn{1}{c}{2007--11}
& \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\
\multicolumn{1}{c}{}
& \multicolumn{1}{c}{[nm]}
& \multicolumn{1}{c}{\tablefootmark{1,2}}
& \multicolumn{1}{c}{\tablefootmark{1}}
& \multicolumn{1}{c}{\tablefootmark{1}}
& \multicolumn{1}{c}{\tablefootmark{1}}
& \multicolumn{1}{c}{\tablefootmark{1,3}}
& \multicolumn{1}{c}{\tablefootmark{4}}
\\
\hline
$V$      & 500--590 & 22  $\pm$ 2   & 20.7 $\pm$ 0.1 & 20.0 $\pm$ 0.1 & 19.4 $\pm$ 0.2 & 20.1 $\pm$ 0.1 & 1.07 $\pm$ 0.02 \\ 
$B$      & 380--490 & 31  $\pm$ 2   & 29.3 $\pm$ 0.1 & 28.0 $\pm$ 0.1 & 27.9 $\pm$ 0.2 & 28.3 $\pm$ 0.1 & 1.05 $\pm$ 0.01\\ 
$U $     & 300--390 & 37  $\pm$ 3   & 38.9 $\pm$ 0.1 & 36.4 $\pm$ 0.1 & 35.4 $\pm$ 0.2 & 36.9 $\pm$ 0.1 & 1.10 $\pm$ 0.01 \\
{\it UVW}1   & 240--360 &              & 46.7 $\pm$ 0.2 & 43.4 $\pm$ 0.1 & 42.4 $\pm$ 0.2 & 43.7 $\pm$ 0.1 & 1.10 $\pm$ 0.01 \\
{\it UVM}2   & 200--270 &              & 60.7 $\pm$ 0.8 & 55.0 $\pm$ 0.4 & 54.3 $\pm$ 0.7 & 55.7 $\pm$ 0.3 & 1.12 $\pm$ 0.03 \\
{\it UVW}2   & 180--230 &              & 63.8 $\pm$ 1.3 & 56.6 $\pm$ 0.8 & 54.9 $\pm$ 1.2 & 57.5 $\pm$ 0.6 & 1.16 $\pm$ 0.05 \\ 
\hline
\end{tabular}
\tablefoot{\tablefoottext{1}{Flux in units of 10$^{-16}$erg/cm$^{2}$/s/{\AA}.}
\tablefoottext{2}{Estimated based on optical grism observation.}
\tablefoottext{3}{Average flux excluding 2003$-$05 data. }
\tablefoottext{4}{Maximum to minimum flux ratio excluding 2003$-$05 data.}} 
\end{table}