\begin{table}%t6
%\centering
\par
\caption{\label{tab6}Broad components of strong emission lines.}
\par
\begin{tabular}{lrrcrr}
\hline\hline\noalign{\smallskip}
& \multicolumn{2}{c}{UVES}&&\multicolumn{2}{c}{FORS (medium)} \\ \cline{2-3} \cline{5-6}\noalign{\smallskip}
Line                    &\multicolumn{1}{c}{Flux\tablefootmark{a}}&\multicolumn{1}{c}{$FWHM$\tablefootmark{b}}&&
\multicolumn{1}{c}{Flux\tablefootmark{a}}&\multicolumn{1}{c}{$FWHM$\tablefootmark{b}} \\
\hline 
4340 H$\gamma$          &  ...~~~~~~   & ...~~~~~~  &&   1.2 $\pm$ 0.1&2500 $\pm$ 200\\
4861 H$\beta$           &  13.3 $\pm$ 3.0& 380 $\pm$ 100&&   5.0 $\pm$ 0.1& 864 $\pm$ 19 \\
&  17.2 $\pm$ 3.0&1050 $\pm$ 300&&   8.0 $\pm$ 0.1&3993 $\pm$ 93 \\
6563 H$\alpha$          &  94.7 $\pm$ 0.4& 709 $\pm$   5&&  47.3 $\pm$ 0.2& 590 $\pm$  5 \\
& 169.1 $\pm$ 0.4&2320 $\pm$  23&&  87.2 $\pm$ 0.3&2619 $\pm$ 37 \\
\hline 
\end{tabular}
\tablefoot{\tablefoottext{a}{Observed flux in units 10$^{-16}$~erg~s$^{-1}$ cm$^{-2}$;} \tablefoottext{b}{in~km~s$^{-1}$.}}  
\end{table}