\begin{table}%t4
 \caption{\label{ecftab}Energy conversion factors used to compute 2XMM catalogue fluxes
(in units of ${\rm 10^{11}~ct~cm^2~erg^{-1}}$). }
\small
%\centering
\par
\begin{tabular}{lllll}
\hline \hline
Camera & Band & Thin & Medium & Thick \\
\hline       
pn    &	1   &	8.95403   &	7.82028   &	4.71096  \\
      &  2  &	8.09027   &	7.83782   &	6.02015  \\
      &  3  &	5.88255   &	5.78272   &	5.00419  \\
      &  4  &	1.92805   &	1.90529   &	1.80647  \\
      &  5  &	0.555226  &	0.554529  &	0.547205  \\
      &  9  &	4.53836   &	4.43953   &	3.74772  \\
MOS1  &	1   &	1.80399   &	1.60150   &	1.06500  \\
      &  2  &	1.88017   &	1.82853   &	1.48465  \\
      &  3  &	2.05034   &	2.01594   &	1.79446  \\
      &  4  &	0.746128  &	0.737800  &	0.707822  \\
      &  5  &	0.143340  &	0.143131  &	0.141213  \\
      &  9  &	1.42040   &	1.39361   &	1.23264  \\
MOS2  &	1   &	1.81179   &	1.60670   &	1.06620  \\
      &  2  &	1.88369   &	1.83088   &	1.48818  \\
      &  3  &	2.05117   &	2.01594   &	1.79530  \\
      &  4  &	0.750569  &	0.741687  &	0.711708  \\
      &  5  &	0.150769  &	0.150560  &	0.148537  \\
      &  9  &	1.42326   &	1.39647   &	1.23524  \\
\hline
\end{tabular}
\end{table}