\begin{table}%t4
\caption{Equivalent widths of H$\alpha$ and  H$\beta$ emission
lines. \label{tab4}}
%\centerline
 {\begin{tabular}{cccccc}
\hline\hline\noalign{\smallskip}
Date &  MJD  & \multicolumn{2}{c}{{\it EW} (\AA)}& \multicolumn{2}{c}{{\it FWHM}$^1$(km s$^{-1}$)}  \\
 &   & H$\alpha$  &H$\beta$ & H$\alpha$ &H$\beta$\\
\hline\noalign{\smallskip}
 28 Sep. 05&53642&550~$\pm$~40&160~$\pm$~5&1800~$\pm$~20&1760~$\pm$~80\\
 29 Sep. 05&53643&630~$\pm$~40&160~$\pm$~5&1735~$\pm$~20&1700~$\pm$~70\\
 03 Oct. 05&53647&900~$\pm$~100&185~$\pm$~8&1590~$\pm$~30&1500~$\pm$~60\\
 05 Oct. 05&53649&1100~$\pm$~100&210~$\pm$~10&1610~$\pm$~30&1490~$\pm$~60\\
\hline
\end{tabular}}
\par
\smallskip
$^1$  The quoted values have been corrected for
instrumental broadening.
\end{table}