\begin{table}%t1
\caption{\label{linrat}Dereddened M~2-29 emission-line flux ratios, relative to
$I$(H$\beta$)~=~100.0.} 
%\centering
\par
\begin{tabular}{llrrrr}
\hline\hline \noalign{\smallskip}
Wavel. & Ident. & \multicolumn{3}{c}{Observed flux} & Model  \\
    $\left[ \AA \right]$   &        & SAAO & (1) & (2) & \\[1mm]  
\hline
     3726 & [\ion{O}{ii}]~  &  43.6 & 42.1  & 34 &  15.8 \\
     3869 & [\ion{Ne}{iii}]~&  72.2 & 49.8  & 58 &  19.7 \\
     4363 & [\ion{O}{iii}]~ &  27.0 & 14.0  & $-$  &  1.9  \\
     4959 & [\ion{O}{iii}]~ & 150.2 & 146.0 & $-$  &  46.8 \\
     5007 & [\ion{O}{iii}]~ & 449.4 & 424.0 & 452&  134.9\\
     6300 & [\ion{O}{i}]~   & 1.6   & 1.1   & $-$  &  0.4  \\
     6548 & [\ion{N}{ii}]~  & 7.0   & 6.9   & $-$  &  10.2 \\
     6584 & [\ion{N}{ii}]~  & 17.8  & 20.8  & 17 &  29.9 \\
     6716 & [\ion{S}{ii}]~  & 1.2   & 1.9   & $-$  &  0.7  \\
     6731 & [\ion{S}{ii}]~  & 1.8   &  2.4  & 2  &  0.8  \\
     7136 & [\ion{Ar}{iii}]~& 9.0   & 12.5  & $-$  &  8.3  \\
\hline
\end{tabular}
\tablefoot {Observed data come from our SAAO spectrum (dereddened with $c_{\beta} = 1.18$ \citep{Hajduk2008}) and from literature (dereddened by the authors).}\vspace*{-1.5mm}
\tablebib{(1) \citet{Exter2004}; (2) \citet{Howard1997}.}
\end{table}