\begin{table}%t6
    \caption{Ultraviolet (IUE)  line fluxes in units of
    \units~for \nsix.  In the last column the fluxes have been corrected for
    interstellar extinction using $E_{B-V}=0.07$ and an
    aperture correction factor of {1.3} has been used.}
  \label{uvflux_n6}
  %\centerline
{ \begin{tabular}{c l c c}
      \hline
      \hline
      \makebox{\rule[0cm]{0cm}{0.33 cm}$\lambda$ (nm)}& Ident. & Flux$^{\rm obs}$ & Flux$^{\rm corr}$\\
      \hline
      \multicolumn{4}{c}{High Resolution}\\
      137.1$^s$        & \ion{O}{v}                  &   2.64  &    5.99 \\
      148.3            & \ion{N}{iv]}                &   0.05  &    0.10 \\
      148.7            & \ion{N}{iv]}                &   0.03  &    0.07 \\
      155.2$^s$        & \ion{C}{iv}                 &  60.87  &  133.67 \\
      166.0            & \ion{O}{iii]}               &   0.34  &    0.74 \\
      166.6            & \ion{O}{iii]}               &   0.98  &    2.13 \\
      174.6            & \ion{N}{iii]}               &   0.22  &    0.47 \\
      174.8            & \ion{N}{iii]}               &   0.21  &    0.45 \\
      174.9            & \ion{N}{iii]}               &   0.66  &    1.42 \\
      190.6            & \ion{C}{iii]}               &   8.34  &   18.19 \\
      190.8            & \ion{C}{iii]}               &   7.66  &   16.71 \\
      229.7            & \ion{C}{iii}                &   1.41  &    3.25 \\
      232.1            & \ion{O}{iii}                &   0.07  &    0.15 \\
      232.5            & \ion{C}{ii]}                &   0.71  &    1.61 \\
      232.7            & \ion{C}{ii]}                &   1.19  &    2.70 \\
      283.7            & \ion{O}{iv]}?               &   1.24  &    2.37 \\
      302.5            & \ion{O}{iii}                &   0.31  &    0.58 \\
      304.7            & \ion{O}{iii}                &   0.55  &    1.02 \\
      313.3$^\natural$ & \ion{O}{iii}                &   0.46  &    0.85 \\
      320.3$^s$        & \ion{He}{ii}                &   0.28  &    0.51 \\
      \hline
      \multicolumn{4}{c}{Low Resolution}\\
      124.4$^s$        & \ion{N}{v}                  &  57.7   &   140.28   \\   
      131.0            &  ?                          &  11.9   &    27.83   \\
      131.7$^b$        &  ?                          &   7.30  &    17.01   \\
      137.6$^s$        & \ion{O}{v}                  &  29.9   &    67.66   \\
      140.9            & ?                           &  14.6   &    32.61   \\
      155.2$^s$        & \ion{C}{iv}                 &  56.4   &   123.85   \\
      164.1$^s$        & \ion{He}{ii}                &  17.4   &    37.96   \\
      166.2            & \ion{O}{iii]}               &   4.50  &     9.78   \\
      172.1            & \ion{N}{iv]}                &  11.0   &    23.69   \\
      174.5            & \ion{N}{iii]}               &   1.90  &     4.08   \\
      175.9            & ?                           &   2.50: &     5.36   \\
      181.4            & \ion{[Ne}{iii]}             &   3.40  &     7.29   \\
      190.7            & \ion{C}{iii]}               &  16.9   &    36.86   \\
      229.6            & \ion{C}{iii}                &   4.90  &    11.30   \\
      231.1            & \ion{C}{ii]}+\ion{O}{iii}   &   7.10  &    16.25   \\
      232.9            & \ion{C}{ii]}                &   3.70  &     8.38   \\
      241.9            & \ion{[Ne}{iv]}              &   2.20  &     4.74   \\
      251.0            & \ion{He}{ii}                &   2.00  &     4.15   \\
      267.7            &      ?                      &   2.30  &     4.52   \\
      279.0            & \ion{[Ar}{v]}+\ion{[Mg}{v]} &   2.10  &     4.04   \\
      283.5            & \ion{C}{ii]}                &  3.00   &     5.73   \\
      292.2$^\dagger$  & \ion{Mg}{v}                 &  0.70   &     1.32   \\
      298.7$^b$        & \ion{[Ne}{v]}?              &  2.20   &     4.12   \\
      318.8            & \ion{Si}{ii}, \ion{He}{i}   &  2.30   &     4.20   \\
      320.9            & \ion{He}{ii}                &  1.50   &     2.73   \\            \hline
    \end{tabular}}
  $^s$Stellar line.\\
   $^\natural$Affected by reseau. \\ 
   $^b$Blended.\\
   $^\dagger$May be present.\\
  : Noisy.
  \end{table}