\begin{table}%t1
\caption{\label{tab_lines}Properties of the detected emission lines. }
%\centerline
{
\begin{tabular}{ccccc}
   \hline\hline\noalign{\smallskip}
   Line          & $\lambda_{\rm peak}$       & $z$   & {\it FWHM}  & {\it EW}      \\
                 &  [\AA]                     &       & [\AA] & [\AA]     \\
   (1)           &  (2)                       &  (3)  & (4)   & (5)       \\
   \hline\noalign{\smallskip}
   \multicolumn{5}{l}{{\it S0927{}, blue system}} \\
   \Mgii{} (broad)   & $4750\pm5$             & 0.697 & $ 68\pm17$ & $85\pm11$ \\
%  \Nev{}            & $5810\pm6$             & 0.696 & $ 21\pm00$ & $7\pm6$   \\
   \Oii{}            & $6335\pm5$             & 0.699 & $ 18\pm10$ & $7\pm4$   \\
   \Neiii{}          & $6565\pm6$             & 0.697 & $ 30\pm8$  & $6\pm3$   \\
   H$\gamma$ (broad) & $7379\pm9$             & 0.700 & $100\pm20$ & $39\pm8$  \\
   \hline
   \multicolumn{5}{l}{{\it S0927{}, rest frame system}} \\
   \Oii{}            & $6382\pm1$             & 0.712 &  $17\pm6$  & $13\pm2$  \\
   \Neiii{}          & $6628\pm3$             & 0.713 &  $17\pm10$ & $4\pm3$   \\
   \hline
   \multicolumn{5}{l}{{\it Companion quasar}} \\
   \Mgii{} (broad)   & $4772\pm8$             & 0.706 &  $55\pm20$ & $45\pm20$ \\
   H$\gamma$ (broad) & $7395\pm15$            & 0.704 &  $30\pm20$ & $22\pm15$ \\
   \hline
   \end{tabular}}
\tablefoot{(1) Line. (2) Peak wavelength from the line fit. (3) Redshift corresponding to
$\lambda_{\rm peak}$. (4) Fitted {\it FWHM} in the observed frame. (5) Line
equivalent width in the observed frame.}
\vspace{-1mm}\end{table}