\begin{table}%T2
\par
    \caption{Integrated fluxes of H$_{2}$CO lines in $T_{\rm mb} ~
      {\rm d}V$ units. Upper limits are given as 2 $\sigma$. The
      "-'' symbol indicates lack of the relevant observation.}
    %\centerline
{
    \begin{tabular}{l l l l l l l l l l}
      \hline
      \hline
      &\multicolumn{3}{c}{o-H$_2$CO}&&\multicolumn{5}{c}{p-H$_2$CO}\\
      \cline{2-4}\cline{6-10}
      Transition & 2$_{1,2}$--1$_{1,1}$ &
      4$_{1,4}$--3$_{1,3}$ & 5$_{1,5}$--4$_{1,4}$ & & 3$_{0,3}$--2$_{0,2}$ & 
      3$_{2,2}$--2$_{2,1}$ & 5$_{0,5}$--4$_{0,4}$ &
      5$_{2,4}$--4$_{2,3}$ & 5$_{4,2}$--4$_{4,1}$$^{{a}}$\\
      \hline
      $E_{u}$ (K)& 21.9 & 45.6 & 62.4 & & 21.0 & 68.1 & 52.2 &
      96.7 & 234\\
      $A_{u,l}$ (s$^{-1}$) & 5.4 $\times$ 10$^{-5}$ &
      6.0 $\times$ 10$^{-4}$ &
      1.2 $\times$ 10$^{-3}$ & & 2.9 $\times$ 10$^{-4}$ &
      1.6 $\times$ 10$^{-4}$ & 1.4 $\times$ 10$^{-3}$ &
      1.2 $\times$ 10$^{-3}$ & 5.0 $\times$ 10$^{-4}$\\
      $\nu$ (GHz) & 140.839 & 281.527 &
      351.769 & & 218.222 & 218.476 & 362.736 & 363.946 & 364.103\\
      $g_u$ & 5 & 9 & 11 & & 7 & 7 & 11 & 11 & 11\\
      Telescope & IRAM & IRAM & JCMT & & IRAM & IRAM & JCMT & JCMT &
      JCMT\\
      HPBW ('') & 17 & 9 & 14 & & 11 & 11 & 14 & 14 & 14\\
      $\eta_{\rm mb}$ or $B_{\rm eff}$/$F_{\rm eff}$ & 0.74 &
      0.47 & 0.63 && 0.62 & 0.62 & 0.63 & 0.63 & 0.63\\
      \hline
      \object{NGC~1333-IRAS~4A} & 9.1 $\pm$ 1.4 & 10.6 $\pm$ 2.6 & 5.5
      $\pm$ 1.2 & & 9.3 $\pm$ 1.9 & 2.2 $\pm$ 0.4 & 2.9 $\pm$ 1.0 
      & 1.2 $\pm$ 0.6 &  1.7 $\pm$ 0.9\\
      \object{NGC~1333-IRAS~4B} & 6.8 $\pm$ 1.0 & 12.1 $\pm$ 3.0 & 7.5
      $\pm$ 1.7 & & 9.6 $\pm$ 1.9 & 4.7 $\pm$ 1.0 & 5.9 $\pm$ 2.1 
      & 3.6 $\pm$ 1.0 & 0.9 $\pm$ 0.6\\
      \object{NGC~1333-IRAS~2} & 4.3 $\pm$ 0.6 & 5.8 $\pm$ 1.5 & 1.6
      $\pm$ 0.4 & & 4.9 $\pm$ 1.0 & 1.0 $\pm$ 0.2 & 1.8 $\pm$ 0.6 
      & 0.6 $\pm$ 0.4 & $<$0.4\\
      \object{L1448-MM} & 3.3 $\pm$ 0.7 & 4.7 $\pm$ 1.1 & 1.0 $\pm$
      0.2 & & 3.4 $\pm$ 0.6 & 0.4 $\pm$ 0.1 & 1.3 $\pm$ 0.4 & 0.2
      $\pm$ 0.1 & $<$0.1\\
      \object{L1448-N} & 7.9 $\pm$ 0.9 & 6.9 $\pm$ 1.6 & 3.8 $\pm$ 0.9
      & & 5.7 $\pm$ 0.9 & - & - & 0.6 $\pm$ 0.2 & - \\
      \object{L1157-MM} & 1.2 $\pm$ 0.2 & 2.1 $\pm$ 0.5 & 1.2 $\pm$
      0.3 & & 1.1 $\pm$ 0.3 & $<$0.2 & 0.5 $\pm$ 0.2 & $<$0.1 & $<$0.1\\
      \object{L1527} & 2.8 $\pm$ 0.7 & 4.5 $\pm$ 1.1 & 1.0 $\pm$ 0.3 &
      & 3.0 $\pm$ 1.3 & 0.2 $\pm$ 0.1 & 0.4 $\pm$ 0.2 & - & -\\  
      \object{VLA1623} & 3.8 $\pm$ 1.2 & 2.7 $\pm$ 1.2 & 0.9 $\pm$ 0.2
      & & 5.0 $\pm$ 1.5 & - & 1.2 $\pm$ 0.4 & $<$0.2 & $<$0.3\\
      \hline
   \end{tabular}}
   \medskip
      $^{{a}}$ {Blended with the 5$_{4,1}$--4$_{4,0}$
      H$_{2}$CO line.}
  \label{table_fluxes_h2co}
\end{table}