\begin{table}%t1
\caption{\label{table:1}Millimeter flux densities, sizes, spectral indexes and masses.}             
\small%\centerline
{     
\begin{tabular}{l c c c c c c c c c c}     
\hline\hline \noalign{\smallskip}      
\multicolumn{1}{c}{} & \multicolumn{2}{c}{Position} & \multicolumn{1}{c}{Peak} & 
\multicolumn{1}{c}{Gaussian width$^1$} &  
\multicolumn{1}{c}{Int. Intensity} & 
\multicolumn{1}{c}{Mass$^2$} & \multicolumn{1}{c}{Size$^3$} & 
\multicolumn{1}{c}{$\alpha$$^4$} & \multicolumn{1}{c}{Sensitivity$^5$} &
\multicolumn{1}{c}{Sampled area$^6$} \\
%
\multicolumn{1}{c}{} & \multicolumn{2}{c}{} & \multicolumn{1}{c}{(mJy/beam)} & 
\multicolumn{1}{c}{($''$)} & \multicolumn{1}{c}{(mJy)} & 
\multicolumn{1}{c}{($M_\odot$)} & \multicolumn{1}{c}{(AU)} & 
\multicolumn{1}{c}{} & \multicolumn{1}{c}{($M_\odot$)} &
\multicolumn{1}{c}{$r$(pc)} 
\\
\hline                 
\multicolumn{7}{l}{Serpens-FIRS~1} \\
1.3~mm & 18:29:49.80 & 01:15:20.41 &  273(1)  & 0.50$''\times0.63''$ & 
357  & 0.1 & 65   & 1.57   & 0.01  & 0.02 \\
3.3~mm & 18:29:49.80 & 01:15:20.41 &  63(0.5) & 0.80$''\times1.73''$ & 71 &
 &   &   &  & 0.04\\
\hline                 
\multicolumn{7}{l}{CB~3-1} \\
1.3~mm & 00:28:42.60 & 56:42:01.11 &  20(1)    & 0.36$''\times0.48''$ & 34  &
0.62 & 600  & 2.52   & 0.04 & 0.16 \\
3.3~mm & 00:28:42.60 & 56:42:01.11 &  2.0(0.5) & 0.88$''\times1.27''$ & 2.9  &
   &  &   & & 0.32 \\
\hline                  
\multicolumn{7}{l}{CB~3-2} \\
1.3~mm & 00:28:42.20 & 56:42:05.11 &  10(1)    & 0.31$''\times0.43''$ & 13  & 
0.24 & 330  & 1.87   &  0.04 & 0.16 \\
3.3~mm & 00:28:42.20 & 56:42:05.11 &  2.1(0.5) & 0.80$''\times1.00''$ & 2.1  & 
& &    &   & 0.32  \\
\hline                 
\end{tabular}}
\smallskip
$^1$ Half-power width of the fitted 2D elliptical Gaussian.
$^2$ Mass estimated using the
1.3mm fluxes and assuming
$T_{\rm d}=100$~K and $\kappa_{1.3~\rm mm}=0.01$~g$^{-1}$~cm$^2$.
$^3$ Deconvolved source size at 1.3~mm.
$^4$ 1.3~mm/3.3~mm spectral index.
$^5$ 5$\times$rms mass sensitivity derived from the 1.3~mm image assuming 
$T_{\rm d}=100$~K and $\kappa_{\rm 1.3~mm}=0.01$~g$^{-1}$~cm$^2$.
$^6$ Radius ({\it HPBW}/2) of the PdBI primary beam
at the source distance.
\end{table}