\begin{table}%t3
\caption{Fluxes, equivalent widths of the H$\alpha$ and H$\beta$ emission 
lines and the extinction coefficients $C$(H$\beta$) in the LSB regions.}
\label{t:emhahb}
%\begin{center}
{
\begin{tabular}{lcclrccrrr} \hline \hline
Telescope&Region&Distance$^{a}$&Aperture$^{b}$&& 
$F$(H$\alpha$)$^{c}$  &$F$(H$\beta$)$^{c}$  &$EW$(H$\alpha$)$^{d}$  
&$EW$(H$\beta$)$^{d}$ &$C$(H$\beta$)   \\ \hline
MMT$^{e}$ &{\it a}1& 10.7~~~~~~&$1.5\times3.4 $&& $3.53 \pm0.14$ & $1.25 \pm0.12$ & $12.30 \pm0.75$ & $2.72 \pm0.24$ & $0.0 \pm0.03$ \\
%&\multicolumn{1}{c}{...}&\multicolumn{1}{c}{...} \\
     &{\it a}2& 29.5~~~~~~&$1.5\times13.2$ && ... & ... &\multicolumn{1}{c}{...}
&\multicolumn{1}{c}{...}&\multicolumn{1}{c}{...} \\ 
  \hline
4~m$^{f}$ &{\it a}3& 12.6~~~~~~&$2.0\times7.6$ && $4.88 \pm0.39$ & $1.88 \pm0.29$ & $32.81 \pm2.32$& $7.72 \pm1.01$ &$ 0.0 \pm0.04$ \\
        &{\it e}3& 18.4~~~~~~&$2.0\times2.8$ && $3.69 \pm0.17$ & $1.19 \pm0.14$ &$109.80 \pm1.41$& $16.57 \pm0.69$ & $0.04 \pm0.06$ \\
        &{\it a}4& 22.6~~~~~~&$2.0\times2.8 $&&     ...       &      ...       &\multicolumn{1}{c}{...}&\multicolumn{1}{c}{...}&\multicolumn{1}{c}{...} \\
   \hline\\[-3mm]
   \end{tabular}}
   \parbox{16.5cm}{
$^{a}$ Distance in arcsec from the brightest H {\sc ii} region {e}1. \\
$^{b}$ Aperture size $x \times y$, where $x$ is the slit width and $y$ the size 
along the slit in arcsec. \\
$^{c}$ In units 10$^{-16}$\ erg\ s$^{-1}$cm$^{-2}$. \\
$^{d}$ In \AA. \\
$^{e}$ Slit orientation with position angle ${\rm PA} = 22^{\circ}$. \\
$^{f}$ Slit orientation with position angle ${\rm PA} = 48^{\circ}$. }
%\end{center}
\par
\end{table}