\begin{table}%t2
    \caption{\label{lines}Emission lines fluxes after correction for Galactic extinction. 
All fluxes are $10^{-15} \rm ~ erg ~ cm^{-2} ~ s^{-1}$; {\it FWHM} are $\rm km ~ s^{-1}$.}
    %\centering
\par
    \begin{tabular}{l  c c c c c  c c}
      \hline \hline
      \noalign{\smallskip}
Obs.  & H$\beta$ & [O~III]$\lambda$4959,~5007 & H$\alpha({\rm narrow})$  & [N~II]$\lambda$6548,~84 &   [S~II]$\lambda\lambda$6716,~6731& H$\alpha({\rm broad})$ & {\it FWHM} \\
\hline
2007 Jul. 10--11 & $<$7.6 & $4.7 \pm 1.2$ & $2.4 \pm 0.5$ & $5.3 \pm 0.6$ & $<$3.1        &  $33.5 \pm 0.9$ &  4600 \\
2007 Sep. 7      & $<$3.0 & $3.4 \pm 0.5$ & $4.8 \pm 1.5$ & $6.1 \pm 1.0$ & $3.9 \pm 0.9$ &  $40.0 \pm 2.1$ &  5000 \\
2008 Jan. 8     & $<$2.0 & $2.5 \pm 0.4$ & $2.5 \pm 0.6$ & $4.7 \pm 0.7$ & $4.4 \pm 0.8$ &  $34.5 \pm 0.9$ &  4200 \\
 \hline
\end{tabular}
\end{table}