\begin{table}%t3
\caption{\label{tab3}Lines detected in [MR81] H$\alpha$ 17 NE.} 
%\centerline
 {\begin{tabular}{lccc} \hline\hline
Line & $\lambda_{0}$ & $\lambda$ & equ. width \\
     & [\AA ] lab.    & [\AA ] obs. & [\AA ] \\ \hline
$[$OI$]$   &  6300   &  6301.0 & $-205:$ \\ 
$[$OI$]$   &  6364   &  6365.0 & $-69:$ \\
$[$NII$]$  &  6548   &  6548.6 & $-11$ \\
H$\alpha$  &  6563   &  6564.1 & $-330:$ \\
$[$NII$]$  &  6583   &  6584.3 & $-36$ \\
HeI        &  6678   &  6679.7 & $-2$ \\ 
$[$SII$]$  &  6716   &  6716.7 & $-21:$ \\
$[$SII$]$  &  6730   &  6731.1 & $-47:$  \\
HeI        &  7066   &  7067.2 & $-2$  \\
$[$FeII$]$ &  7155   &  7156.3 & $-13$  \\
$[$FeII$]$ &  7452   &  7453.5 & $-3$ \\
$[$FeII$]$ &  8617   &  8618.3 &  $-9$ \\
$[$FeII$]$ &  8892   &  8893.8 &  $-2$  \\ \hline
\end{tabular}}
\par
\smallskip
Note: colons indicate uncertain limits due to saturation.
\end{table}