\begin{table}%t5
\caption{Electron temperature indicators in \object{NGC~6826}.}\label{tab5}
%\centering
\small
\begin{tabular}{lcccc}
\hline
\hline
Ion & Ioniz. & Lines& Observed & $T_{{\rm e}}$\\
 & pot. (eV)& used &ratio  & (K) \\
\hline
$[$\ion{N}{ii}$]$ & 14.5 & 5755/6584 & 0.0171 & 9900\\
$[$\ion{S}{iii}$]$ & 23.3 & 6312/18.7 & 0.036 & 9100 \\
$[$\ion{S}{iii}$]$ & 23.3 & 9531/18.7 & 1.73   & 9600 \\
$[$\ion{Ar}{iii}$]$ & 27.6 & 7136/8.99 & 1.075 & 9400\\
$[$\ion{N}{iii}$]$ & 29.6 & 1750/57.3 & 0.053 & 8900 \\
$[$\ion{O}{iii}$]$ & 35.1 & 4363/5007 & 0.00498 & 9350\\
$[$\ion{O}{iii}$]$ & 35.1 & 1663/5007  & 0.00283 & 8600\\
$[$\ion{O}{iii}$]$ & 35.1 & 5007/51.8  & 4.43  &  8550 \\
$[$\ion{Ne}{iii}$]$ & 41.0 & 3868/15.5 & 0.447 & 9100\\
\hline
\end{tabular}
\end{table}