\begin{table}%t1
\caption{\label{ecf}Count rate conversion factors to unabsorbed fluxes (ECF) into the 0.2$-$1~keV band 
           for black body models with temperatures of 40~eV and 50~eV 
	   for different instruments and filters, including
	   a Galactic foreground absorption of 6.66~\hcm{20}.}
	   %\centering
\par
\begin{tabular}{lrrr}
\hline 
\hline
\multicolumn{1}{l}{Detector} & \multicolumn{1}{c}{Filter} &\multicolumn{1}{c}{40~eV} &\multicolumn{1}{c}{50~eV} \\ 
& & \multicolumn{2}{c}{($10^{-11}$~erg~cm$^{-2}$ ct$^{-1}$)} \\
 \hline 
EPIC PN   & thin   & 1.77 & 1.04 \\
          & medium & 2.15 & 1.22 \\
EPIC MOS1 & thin   & 9.66 & 5.14 \\
          & medium & 11.4 & 5.94 \\
EPIC MOS2 & thin   & 9.23 & 5.00 \\
          & medium & 11.1 & 5.78 \\
Chandra ACIS~S &   & 7.25 & 5.10 \\
Chandra HRC~I  &   & 9.17 & 6.76 \\	  
ROSAT HRI &        & 29.9 & 24.9 \\
ROSAT PSPC&        & 6.42 & 6.55 \\
\hline
\end{tabular}
\end{table}