\begin{table}%t3
%\centering
\par
\caption{Constraints on the contribution of starburst and AGN activity to
the infrared luminosity of \object{NGC~6240}.}
\label{tab:constraints}
\begin{tabular}{lcc}\hline\hline
Constraint                  &Starburst    &AGN      \\ \hline
Low excitation mid-IR lines &50--100\%    &         \\
PAH features                &$>$33\%      &         \\
High excitation mid-IR lines&             &$>$24\%  \\
Mid-IR dust continuum       &             &$>$13\%  \\
Hard X-ray emission         &             &10--100\%\\ \hline
\end{tabular}
\end{table}