\begin{table}%t1
\caption{\label{tab:mpclass}Numbers of different metal-poor classes among the candidate HES turnoff sample, the sample with follow-up observations from SSO, and the accepted sample after the visual inspection and rejection as described in Sect.~\ref{subsec:measurement}.}
%\centerline
{\small
\begin{tabular}{lcccc}
\hline\hline\noalign{\smallskip}
	Class & HES prism & SSO follow-up & Accepted & Factor \\
\hline
  	mpca & 179 & 36 & 29 & 6.17 \\
	unid & 333 & 67 & 59 & 5.64 \\
	mpcb & 1666 & 560 & 513 & 3.25 \\
	mpcc & 1205 & 19 & 16 & 75.31 \\
\hline
	Total & 3383 & 682 & 617 & \\
\hline
\end{tabular}}
\tablefoot{The column labelled ``Factor'' refers to the scaling factor used to construct the MDF described in Sect.~\ref{subsec:measurement}}
\end{table}