\begin{table}%T1
\caption{The parameters of the orbital modulation of the emission lines' radial velocities.}
\label{velocity}
%\centerline
{
\begin{tabular}{l l l l }
\hline \hline
Lines &  $\gamma$ (\kms )  & $K$ (\kms ) &  Phase (*)  \\
\hline
\Hg    & +12.7 (1.4) & 66.5 (2.0) & 0.003 (0.030)   \\
\Hb    & +10.6 (0.4) & 67.4 (0.6) & 0.000 (0.009)   \\
\HeII  & --14.7 (0.9) & 42.2 (1.2) & 0.024 (0.029)   \\
\HeIIb & --34.2 (5.2) & 33.5 (7.4) & 0.021 (0.220)   \\
\Ha    & --22.8 (0.4) & 74.8 (0.6) & 0.0   (fixed)   \\           
\hline
\end{tabular}}
\smallskip
* Phase of the blue-to-red zero crossing.\\
1-$\sigma$ error bars into parentheses.
\end{table}