\begin{table}%t2
%\centering
\par
\caption{\label{tab:PNLTOT1}M~87 halo PNs and sampled luminosities.}
\begin{tabular}{lccc}
\hline \hline
Field    &  $N_{\rm spectr}$  &  Area        & $L$             \\
         &                &  kpc$^2$     & $L_{V,\odot}$ \\
         \hline
\\
FCJ red  &   12           &    4157      &  $8.7\times 10^9$   \\
F7  red  &   5            &    4349      &  $1.3\times 10^9$   \\
F7 green &   0            &    8909      &  $1.2\times 10^9$   \\
\hline\\
\par
\end{tabular} \\
\par
\end{table}