\begin{table}%t3
%\centering
\par
\caption{Frequency of modulation for absorption and emission part of CIV1550 line.\label{t3}}
\begin{tabular}{ccc}
\hline\hline
~& $f$ [c/d] & Epoch of max. \\
\hline
Emission CIV  &  $7.246\pm{0.023}$ & $3.0677\pm{0.0030}$ \\   
Absorption CIV &  $ 7.244\pm{0.050}$ & $3.0383\pm{0.0056}$ \\  
Average CIV&  $7.246\pm{0.020}$ & --- \\  
SiIV&         $7.206\pm{0.056}$ & $3.0654\pm{0.0053}$ \\
Orbital &  $7.242\pm{0.006}^a$ & --- \\
Jun. 3--8 & $7.468\pm{0.030}^a$ & --- \\
Jun. 3--26 & $7.462\pm{0.006}^a$ & --- \\
Jul. 24--Aug. 11 & $7.435\pm{0.013}^a$ & --- \\
Aug. 8--Sep. 14 & $7.429\pm{0.006}^a$ & --- \\
Average Phot.&$7.446\pm{0.009}$ & --- \\
\hline
\end{tabular}
\smallskip
$^a$ From Patterson et~al. (\cite{Patterson97}).
\end{table}