\begin{table}%T3
\par
%\centering
\par
    \caption{Integrated fluxes of H$_{2}$$^{13}$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.}
    \label{table_fluxes_h213co}
    \begin{tabular}{l l l l l l}
      \hline
      \hline
      &\multicolumn{3}{c}{o-H$_2^{13}$CO} & &
      \multicolumn{1}{c}{p-H$_2^{13}$CO}\\
      \cline{2-4}\cline{6-6}
      Transition & 2$_{1,2}$--1$_{1,1}$ &
      4$_{1,4}$--3$_{1,3}$ & 5$_{1,5}$--4$_{1,4}$ & &
      5$_{2,4}$--4$_{2,3}$ \\
      \hline
      $E_{u}$ (K)& 21.7 & 44.8 & 61.3 & & 98.5\\ $A_{u,l}$ (s$^{-1}$) &
      1.5 $\times$ 10$^{-4}$ & 1.7 $\times$ 10$^{-3}$ & 3.4 $\times$
      10$^{-3}$ & & 1.1 $\times$ 10$^{-3}$\\
      $\nu$ (GHz) & 137.450 & 274.762 &
      343.325 & & 354.899\\
      HPBW ($''$) & 17 & 9 & 14 & & 14\\
      Telescope & IRAM & IRAM & JCMT & & JCMT\\
      $\eta_{\rm mb}$ or $B_{\rm eff}$/$F_{\rm eff}$ & 0.74 &
      0.47 & 0.63 & & 0.63\\
      \hline
      \object{NGC~1333-IRAS~4A} & 0.4 $\pm$ 0.1 & 0.3 $\pm$ 0.1 &
      0.3 $\pm$ 0.2 & & $<$0.1\\
      \object{NGC~1333-IRAS~4B} & - & - & 0.3 $\pm$ 0.1 & & $<$0.1\\
      \object{NGC~1333-IRAS~2} & 0.2 $\pm$ 0.1 & - & 0.4 $\pm$ 0.2 & &
      $<$0.1\\
      \object{L1448-MM} & - & - & $<$0.1 & & $<$0.2\\
      \object{L1448-N} & 0.2 $\pm$ 0.1 & $<$0.1 & - & & -\\
      \object{L1157-MM} & - & - & $<$0.1 & & $<$0.1\\
      \hline
   \end{tabular}
\end{table}