\begin{table}%T1
  \caption{\label{spec.tab} The four radiation components of our T~Tauri model 
    star. }
\small%\centering
\par
\begin{tabular}{l  l c c  c  c}
\hline\hline\noalign{\smallskip}
  &   &(1) &(2)  & (3) & (4)\\ 
\hline
\noalign{\smallskip}
$i$ & component &$L/L_*$ & spectrum & $h\overline{\nu}_{\rm em}$ & $F_{10}$ \\ 
& & & & (eV) & (erg s$^{-1}$cm$^{-2}$) \\
\noalign{\smallskip}
1& photosphere & 0.99   &4000~K  \ BB              & 0.9 & 30~000 \\
2& FUV        & 0.01   &15~000~K \ BB                 & 3.5 & 300 \\
3& EUV        & 0.001  &$3\times 10^5$~K \ BB    & 70 & 30 \\
4& X-rays ($h\nu < 2$~keV) & $2.5\times 10^{-4}$& $\propto$$\nu^2$& 1330 & 10 \\
\hline
\end{tabular}
\tablefoot{(1) fractional luminosity; 
 (2) spectral shape (BB = blackbody); 
 (3) mean energy of emitted photons, $h\overline{\nu}_{\rm
{em}}$; 
 (4) approximate flux at~10~AU,~$F_{10}$.}
\end{table}