\begin{table}%t2
%\centering
\par
\caption{Column densities of the different energy levels of H$_2$. $g$
is the statistical weight of each level. "cold'' and "warm'' H$_2$
are distinguished from the excitation diagram (see Fig.~\ref{fig3}).
``sat'' and ``unsat'' are respectively for saturated and unsaturated
lines. Only the fitted lines are listed.}
\label{tab2}
\begin{tabular}{cccccc}
\hline
\hline
  $J $   & $g$  & Energy level & Wavelength & Line  &              $N$                 \\
 ($v=0$) &    & (cm$^{-1}$)  & \AA\       & state &  (cm$^{-2}$)              \\
\hline\noalign{\medskip}
  0   & 1  &  0.00       & 1092.2020  & damped & $1.20_{-0.23}^{+0.75}\times10^{20}$   \\
      &    &             & 1108.1390  & damped &  		  \\
  1   & 9  &  118.49     & 1092.7390  & damped & $9.12_{-6.09}^{+4.58}\times10^{19}$  \\
      &    &             & 1094.0590  & damped &  		  \\
      &    &             & 1108.6440  & damped &  	                  \\
      &    &             & 1110.0740  & damped &  		\\
  2   & 5  &  354.39     & 1066.9070  & sat    & $1.58_{-0.93}^{+6.16}\times10^{16}$ \\
      &    &             & 1094.2510  & damped &  		 \\
      &    &             & 1096.4460  & sat    &  		 \\
      &    &             & 1110.1310  & damped &  	                \\
      &    &             & 1112.5081  & unsat  &  	                  \\
  3   & 21 &  705.50     & 1067.4850  & sat    & $1.10_{-0.79}^{+1.81}\times10^{16}$ \\
      &    &             & 1096.7310  & sat    &  		 \\
      &    &             & 1099.7950  & unsat  &  		\\
      &    &             & 1112.5940  & unsat  &  		 \\
      &    &             & 1115.9070  & unsat  &  		 \\
  4   & 9  & 1168.53     & 1100.1689  & unsat  & $6.02_{-5.15}^{+8.08}\times10^{15}$ \\
      &    &             & 1116.0250  & unsat  &                                  \\
      &    &             & 1120.2610  & unsat  &                               \\
\noalign{\medskip}\hline
\noalign{\medskip}
cold H$_2$ & $J=0$--2 &     &            &        & $2.11_{-0.83}^{+1.21}\times10^{20}$  \\
\noalign{\medskip}
warm H$_2$ & $J=3$--5 &     &            &        & $1.70_{-0.94}^{+2.62}\times10^{16}$  \\ 
\hline
\end{tabular}
\end{table}