\begin{table}%t2
\caption{\label{tab_cc}Classification of protostars in the Rosette central cluster.}\vspace*{-2mm}
\small
%\centering
\par
\begin{tabular}{l c c c c}
\hline\hline\noalign{\smallskip}
 & \# total & \# Class~II & \# Class~I & \# Unclass. \\
\hline
24~\micron~sources          & 83  & 39 &  26  & 18  \\
Visible in 70~\micron        & 40 ($\pm$3)  & 10 ($\pm$1) &  19 ($\pm$1)  & 11 ($\pm$1)  \\\hline
\noalign{\smallskip}
In \emph{Herschel} sample       & 22  &  1  &  12  &  9  \\
Candidate Class~0 & 14  &  0  &  7   &  7  \\
\hline
\end{tabular}\vspace*{-2mm}
\tablefoot{The cluster area is defined here by  {$98.5^\circ<{\rm RA}<98.6^\circ$} and
 {$4.25^\circ<{\rm Dec}<4.4^\circ$}.
The table head classifications base on near- to mid-infrared measurements.
Class~0 candidates exhibit~\mbox{$\lsmm/\lbol>1\%$}.}
 \vspace*{-3mm}
\end{table}