\begin{table}%t3
%\centering
\par
\caption{Columns: 
(2) transition radius (arcsec); 
(3) masked area relative to $1\sigma_{\rm sky}$ of the galaxy; 
(4) \mbox{S\'ersic} shape parameter; 
(5) effective radius~(\arcsec); 
(6) effective surface brightness (mag~arcsec$^{-2}$);
(7) total~magnitude of the LSB component derived form the fit (mag); 
(8) $\chi^{2}_\nu$. 
In bold the best fitting parameters.}
\label{T4}
\begin{tabular}{l l c c c c c c}
\hline\hline
\noalign{\smallskip}
\multicolumn{8}{l}{Sensitivity of \mbox{S\'ersic} parameters of Mrk~5~($B$) to changes in the sky 
background}
\\\hline
Sky background & \mbox{$R_{\rm tran}$} & $P_{\rm area}$ (\%) & $n$ & \mbox{$r_{\rm e}$}  & $\mu_{\rm e}$  & $m_{\rm tot}$  &  ${\chi^2}_{\nu}$ \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
 Correct sky &  {\bf 10.97}  &  {\bf 10.9}  & {\bf 0.99} & {\bf 9.62} & {\bf 23.63} &{\bf 16.02} & {\bf 2.232} \\[2pt]
 Sky over-subtracted &  10.97  & 10.9  & 0.88 & 9.23 & 23.54  & 16.08 & 3.093\\[2pt]
 Sky undersusbtracted&  10.97  & 10.9  & 1.17 & 10.47 & 23.83  & 15.97 & 3.013  \\[2pt]
\noalign{\smallskip}
\hline
\end{tabular}
\end{table}