\begin{table}%T4
\caption{ Our measured O~IV Stark shifts ($d_{\rm m}$) at $T=42~000$~K
electron temperature and $10^{23}$ m$^{-3}$ electron density with $\pm 0.48$ pm estimated accuracies.
$d_{\rm th}$ denote theoretical Stark shift values (Blagojevi\'c et~al. \cite{Blagojevi96}) at mentioned plasma parameters. Positive shift is toward
the red.}\label{tab4}
\par
%%\centerline
\par
{
\vbox{\offinterlineskip \hrule\vskip0.4mm\hrule \halign{&\vrule#&
\strut\hbox to1.55pt{}\hfil#\hbox to1.55pt{}\cr
%  \strut\hbox to1pt{}\hfil#\hbox to1pt{}\cr
height4pt&\omit&&\omit&&\omit&&\omit&\cr
&$\lambda$\hfil&& $d_{\rm m}$\hfil&& $d_{\rm th}$\hfil&& $d_{\rm m}/d_{\rm th}$\hfil&\cr
&(nm)\hfil&&(pm)\hfil&&(pm)\hfil&& &\cr
\noalign{\hrule}
&307.160&& 1.39&& 1.15&& 1.21&\cr
&306.343&& 1.46&& 1.15&& 1.27&\cr
&340.355&& 1.17&& 0.95&& 1.23&\cr
&341.169&& 1.27&& 0.95&& 1.33&\cr
&338.552&& 0.00&& && &\cr}\hrule
}}
\end{table}