\begin{table}%t7
%\centering
\par
\caption{\label{apex-ir-luminosity}Properties of the ATLASGAL sources with a counterpart in the mid-infrared emission, derived by fitting the 870 and 70~$\mu$m points with a modified black body.}
\begin{tabular}{c c r c c  c c c c }
\hline\hline \noalign{\smallskip}
Source &  Radius & $d$\tablefootmark{a} & $F_{24~\mu{\rm m}}$ & $F_{70~\mu {\rm m}}$ & $T_d$ &  $L$ & $M$ & $\Sigma$\\ 
&(pc) & (kpc) & (Jy) & (Jy) & (K) & ($\times$$10^4~L_{\odot}$) & ($\times$$ 10^2~M_{\odot}$) & (g~cm$^{-2}$)\\ 
(1)&(2)&(3)&(4)&(5)&(6)&(7)&(8)&(9)\\
\hline
C2  &  0.7    &  12.6   &  7.6 $\pm$ 1.5 &  119.8 $\pm$ 24.0    &      25  &  5   &  60  &  0.81  \\  
  C3  &  0.7    &  12.6   &  4.0 $\pm$ 0.8 &   68.8 $\pm$ 13.8    &      25  &  3   &  30  &  0.41  \\   
  C4  &  0.7    &  12.6   &  2.1 $\pm$ 0.4 &   42.8 $\pm$ 8.6     &      27  &  2   &  10  &  0.14  \\   
  C5  &  0.7    &  12.6   &  3.8 $\pm$ 0.8 &   29.0 $\pm$ 5.8     &      26  &  1   &  10  &  0.14  \\   
  C7  &  0.7    &  11.7   &  9.1 $\pm$ 1.8 &  107.3 $\pm$ 21.5    &      28  &  3   &  20  &  0.27  \\  
  C8  &  0.7    &  11.7   &  7.2 $\pm$ 1.4 &   94.2 $\pm$ 18.8    &      33  &  2   &  6   &  0.08  \\   
  C10 &  0.7    &  11.7   &    --        &  100.6 $\pm$ 20.1    &      29  &  3   &  10  &  0.14  \\  
  C11 &  0.7    &  11.7   &  6.8 $\pm$ 1.4 &   51.4 $\pm$ 10.3    &      28  &  2   &  9   &  0.12  \\ 
  C13 &  0.6    &  11.7   &  2.6 $\pm$ 0.5 &   72.0 $\pm$ 14.4    &      32  &  1   &  4   &  0.07  \\ 
  C14 &  0.5    &   4.7   &  5.1 $\pm$ 1.0 &   17.8 $\pm$ 3.6     &      20  &  0.3 &  9   &  0.24  \\  
\hline
\end{tabular}
\tablefoot{Column~(1): ATLASGAL continuum source; Col.~(2): radius of the APEX continuum source; Col.~(3): distance of the source; Col.~(4): flux density at 24~$\mu$m of the IR source associated with the ATLASGAL 870~$\mu$m source; Col.~(5): flux density at 70~$\mu$m of the IR source associated with the ATLASGAL 870~$\mu$m source; Col.~(6)--(8): output of the modified black body fit. In particular: the dust temperature; the luminosity; the mass; and the surface density. \tablefoottext{a}{All the sources are assumed to be at the far kinematic distances, except C14.}}
\end{table}