\begin{table}%t1
\caption{\label{log}Log of observations and results for GG Car.}
%\centerline
{\begin{tabular}{lllllll}
\hline \hline
Date 			                &  
IT$^{a}$            &
\it{S/N}$^{b}$                 &
$\it{P}_{\rm obs}$$^{c}$	&
PA$_{\rm obs}$$^{c}$	    &
PA$_{\rm int}$	\\
    &          (s)      &       &  (\%) & (\degr) &  (\degr) \\       
\hline
2006 Apr. 05  	& 4800  & 104  & 1.6 (0.1) &  85 (2) &  84 (6) \\
2006 May 18  	  & 4800  & 154  & 1.5 (0.1) &  84 (2) &  85 (4) \\
\hline
\end{tabular}}
\medskip
\par
Errors in parenthesis. $^{a}$ Total integration time (8 $\times$ individual integration time by waveplate position); $^{b}$ signal-to-noise ratio per pixel for the unbinned spectra; $^{c}$ mean values for the full~spectrum (6300--6800~$\rm \AA$) binned with a polarization error (per bin) of 0.1\%. The quoted polarization error is the average error per bin and the PA error is given by 28.65$\times\sigma_{P}/P$~\rm(Serkowski~\cite{ser74}).
\end{table}