\begin{table}%t3[ht]
\caption{Fit parameters obtained for model~B: $x$ and $y$ are 
the HI and HeI column densities in units of $10^{17}$~cm$^{-2}$.\label{tab3}}
%\centering
\par
\begin{tabular}{cccccc}
\hline\hline \noalign{\smallskip} 
Filament & $ I_{\rm fil}/I_{\rm qs}$ & $x$  & $y$  & HeI/HI& $\chi^ 2$  \\
\hline
%    &       &        &        &         &      \\
FP1 &   1.0 & 10.1   &  0.5   &  5 ($-$2) &  0.4 \\
F2  &  1.16 &  13.3   &  1.1  &  8.2 ($-$2) &  0.7 \\
F3  &  0.62 &  11.1   &  0.9  &  7.9 ($-$2) & 0.2  \\
\hline
\end{tabular}
\end{table}