\begin{table}%t7
    \caption{Optical line fluxes for \nsix. In Col.~8
       the average  fluxes from MP, M,
    AC and H-east are given (see
    Sect.~4.2 for details). All the fluxes from Cols.~3 to 8 
    have been corrected
    for extinction using $C_{{\rm H_{\beta}}}=0.2$ (as are given in the
    literature) and are relative to \hbeta. In this paper a lower
    extinction  is found. 
    The last column lists the average fluxes corrected
    for extinction using $C_{{\rm H_{\beta}}}=0.1$ ($E_{B-V}=0.07$) and in units of \units.}
    \label{opflux_n6}
%\centerline
{\begin{tabular}{c l l l l l l l c l}
              \hline
        \hline
        \makebox{\rule[0cm]{0cm}{0.33 cm}$\lambda$} & Ident. &
        \multicolumn{6}{c}{Flux$^\dagger$} &  &
        \multicolumn{1}{c}{$\overline{Flux}$} \\ \cline{3-7} 
        (nm) & & MP& Midd & AC & H-East & H-North & Average & & \\
        \hline
\makebox{\rule[0cm]{0cm}{0.33 cm}372.6} & \ion{[O}{ii]}  & 15.5$^b$ & 23.9$^b$ & 21.0$^b$ & 8.292 &  23.53 &  8.292  & &   24.35 \\
372.9 & \ion{[O}{ii]}  &          &          &          & 3.471 &  10.15 &  3.471  & &   10.20 \\
386.9 & \ion{[Ne}{iii]}& 60.42    &          & 51.0     & 48.35 &  38.67 &  53.26  & &  157.4 \\ 
396.8 & \ion{[Ne}{iii]}& 35.65    &          & 32.0     & 18.62 &  16.56 &  28.76  & &   85.4 \\ 
406.9 & \ion{[S}{ii]}  &          &          &          & 0.540 &  2.108 &  0.54   & &    1.61 \\
407.6 & \ion{[S}{ii]}  &          &          &          & 0.358 &  0.848 &  0.385  & &    1.15 \\
436.3 & \ion{[O}{iii]} & 1.49     & 1.80     & 2.2      & 2.051 &  1.581 &  1.89   & &    5.71 \\
447.2 & \ion{He}{i}    & 6.20     & 5.30     & 6.02     & 6.018 &  5.158 &  5.88   & &    17.9\\
468.6 & \ion{He}{ii}   &          &          &          & 0.050 &        &  0.05   & &     0.15\\
471.1 & \ion{[Ar}{iv]} &          &          & 1.3      & 0.935 &  0.284 &  1.12   & &    3.45\\
474.0 & \ion{[Ar}{iv]} &          &          &          & 0.910 &  0.360 &  0.91   & &    2.81\\
486.1 & \ion{H}{i} (\hbeta) &100& 100      & 100      & 100   & 100    &  100    & &    310.9\\
495.9 & \ion{[O}{iii]} & 264.1    & 227.3    &          & 218.8 &  172.2 &  236.7  & &   740.4\\
500.7 & \ion{[O}{iii]} & 774.7    & 663.0    & 675.0    & 704.3 &  518.5 &  704.2  & &     2209\\
519.2 & \ion{[Ar}{iii]}&          &          &          & 0.055 &  0.051 &  0.055  & &     0.17\\
551.8 & \ion{[Cl}{iii]}&          &          &          & 0.380 &  0.478 &  0.380  & &     1.22\\
553.8 & \ion{[Cl}{iii]}&          &          &          & 0.535 &  0.603 &  0.535  & &     1.72\\
575.4 & \ion{[N}{ii]}  &          &          &          & 0.242 &  0.905 &  0.242  & &     0.81\\
587.6 & \ion{He}{i}    & 23.80    & 15.6     & 15.1     & 20.15 &  14.10 &  18.66  & &     60.9\\
610.2 & \ion{[K}{iv]}  &          &          &          & 0.042 &  0.016 &  0.042  & &     0.14\\
631.2 & \ion{[S}{ii]}  &          &          & 0.74     & 0.912 &  1.309 &  0.826  & &     2.74\\
654.8 & \ion{[N}{ii]}  & 10.40    & 5.7      &          & 4.884 &  21.97 &  6.99   & &    23.3\\
658.3 & \ion{[N}{ii]}  & 17.30    & 16.8     & 16.2     & 17.27 &  59.29 &  16.89  & &    56.4\\
671.6 & \ion{[S}{ii]}  &          &          & 0.85     & 0.652 &  3.021 &  0.751  & &     2.52\\
673.1 & \ion{[S}{ii]}  &          &          & 1.40     & 1.502 &  5.722 &  1.451  & &     4.86\\
713.6 & \ion{[Ar}{iii]}& 22.2     &          & 14.0     & 21.18 &  17.45 &  19.13  & &    64.8\\
717.1 & \ion{[Ar}{iv]} &          &          &          & 0.026 &  0.025 &  0.026  & &     0.09\\
753.0 & \ion{[Cl}{iv]} &          &          &          & 0.144 &  0.057 &  0.144  & &     0.49\\
775.1 & \ion{[Ar}{iii]}&          &          & 3.0      & 4.674 &  4.589 &  3.837  & &    16.10\\
804.6 & \ion{[Cl}{iv]} &          &          &          & 0.300 &  0.110 &  0.300  & &     1.05\\
857.9 & \ion{[Cl}{ii]} &          &          &          & 0.048 &  0.127 &  0.048  & &     0.17\\
953.1 & \ion{[S}{iii]} &          &          &          & 19.10 &  46.46 &  19.10  & &    68.4\\
\hline
     \end{tabular}}
  $^\dagger$ References: MP: \citet{manchado}, M:
  from \citet{mid}, AC: \citet{aller0}, H-east and H-north: \citet{hyung}.\\
  $^b$ Blended with the line at 372.9 nm.
  \end{table}