\begin{table}%t8
\caption{Bolometric and X-ray luminosities (derived from X-ray \mbox{spectra}).\label{lumitab}}
%\centerline
{\begin{tabular}{lrrr}
\hline\hline
Source & $L_{\rm bol}^{a}$ & $L_{\rm X}$ & log($L_{\rm X}/L_{\rm bol})$\\
       & $L_\odot$     & $10^{-3}$~$L_\odot$ \\
\hline
IRS 2 & 16 & 0.93 & $-4.2$\\
IRS 5 &  4 & 1.70 & $-3.4$\\
IRS 1 & 19 & 0.75 & $-4.4$\\
R CrA & 132& 0.18 & $-5.9$\\
%RCRA: Lorenzetti+99, Rest Wil92 skaliert
%corolumis.sxc
\hline
\end{tabular}}
\par
\smallskip
$^{a}$ Scaled to $d=150$~pc from \citet{wil92},  
for R~CrA directly from \citet{lor99}.
\end{table}