\begin{table}%t2
\caption{\label{histo}Temporal evolution in the multicolor polarization of GG Car from the literature.}
%\centerline
{\begin{tabular}{lllll}
\hline \hline
Date/epoch &
Band & $\it{P}$ & PA & Ref.$^{a}$ \\
     &       &      (\%)        &       (\degr)            &                \\ 
\hline
1973$-$1975 &	  $V$  &  2.2 (0.1)     & 99.3   &   1   \\
1980 Mar.  &   $U$   &  0.8 (0.1)     & 99.0   &   2   \\
          &   $B$   &  1.6 (0.1)     & 99.0   &   2   \\
          &   $V$   &  1.65 (0.4)    & 95.0   &   2   \\
1989 May  &   $U$   &  1.6  (0.1)    & 100    &   3   \\
          &   $B$   &  2.5 (0.1)     & 100    &   3   \\
          &   $V$   &  2.1 (0.1)     & 100    &   3   \\
          &   $R$   &  1.9 (0.1)     & 100    &   3   \\
\hline
\end{tabular}}
\medskip
\par
Errors in parenthesis. $^{a}$ (1) Klare \& Neckel~(\cite{kla77}), mean of two measurements. It is not clear which broadband filter was used. We assumed optical V broadband for simplicity; (2) Barbier \& Swings~(\cite{bar82}), mean of five measurements and after taking into account an interstellar contribution; (3)~Gnedin et~al.~(\cite{gne92}). The PA quoted is the mean value including all filters as reference.
\end{table}