\begin{table}%t1
%\centering
\par
\caption{Diffuse X-ray emission in HH~168 (0.3--1.5~keV).}\label{tab:HH168_results}
\begin{tabular}{l c c c c}
\hline\hline
Component & Photons & Est. background & Median & Area\\
 &  & photons & energy & arcsec$^2$\\
\hline
Ellipse & 133 & 32.0 & 0.95 keV & 1463\\
HW object & 16 & 1.3 & 1.1 keV & 61\\
Knot E & 30 & 2.4 & 0.85 keV & 108\\
Knot F & 11 & 1.0 & 1.1~kev & 44\\
\hline
\end{tabular}
\end{table}