\begin{table}%t6
\caption{\label{tab_sb}{\it Giant} \hii\ regions with derived chemical abundances.}
\par
%\centering
\par
 {
\begin{tabular}{lllll}
\hline
\hline\noalign{\smallskip}
Id    & $R_{\rm GC}$       & $F_{\rm H\alpha}$                         &   $R$              & SB \\
              & (kpc)               &(10$^{-15}$ erg/cm$^2$~s)         & (arcsec)      &(10$^{-19}$ erg/cm$^2$~s arcsec$^2$)            \\
\hline
NGC 595       	&	1.7   &       13.0 	 &        25 &  16.1 \\
C001Ab       	&	1.9   &  	    3.2   	&       20 &  6.2 \\
MA2       		&	2.5   &     	4.5   	 &      25 &  5.6 \\
BCLMP691    &   3.3   &    		2.4      &      15 &  8.2 \\
NGC 604       	&	3.5   &   		36.6    &      30 &  31.4  \\
IC 131          	&	3.9    & 		1.9    &      15 &  6.6  \\
BCLMP290     &   4.2    &     	2.2    &      15 &   7.5  \\
NGC 588       	&	5.5    &    	4.2     &     20 &  8.0 \\
IC 132       	     &	6.4    &    		3.5     &     20 &  6.8 \\
\hline
\end{tabular}}
\end{table}