\begin{table}%t1
\caption{\label{tab_regions}Protostar subsamples seen by \emph{Herschel} in Rosette.}  \vspace*{-2mm}           % title of Table
\small      
%\centering
\par
\begin{tabular}{l l c}         
\hline\hline \noalign{\smallskip}              
Region & Associated Clusters & \# Protostars \\     
\hline                         
Centre & PL4/5, REFL08, E & 27 \\       
Shell   & PL1, A                      &  5 \\       
Monoceros Ridge/ & & \\
\quad Extended Ridge & PL2, C & 11 \\       
PL3    &  --                          &  4  \\      
AFGL~961 & PL6               &  6 \\      
PL7    & G                          & 11 \\
Distributed & --                    & 24 \\
\hline                                    
\end{tabular}\vspace*{-2mm}
\tablefoot{Cluster names are PL for \citet{phelpslada1997},
REFL for \citet{romanzuniga2008}, A\dots G for \citet{poulton2008}.}\vspace*{-2mm}
\end{table}