\begin{table}%t2
  \caption{\label{table:4}Scaling factors used to convert fluxes to different energy bands.}       
\small%\centerline
 {
\begin{tabular}{c c }         
\hline\hline                  
Energy band &  $\alpha=S_{\rm b}/S_{\rm 0.5-10~keV}$    \\
 (1) & (2) \\
\hline                         
0.5--1  & 0.15\\
1--2    & 0.16\\
2--4.5  & 0.29\\
4.5--10 & 0.39 \\
0.5--2  & 0.32\\
2--10   & 0.68\\
2--8    & 0.56\\
2--12   & 0.79\\
4.5--7.5 & 0.24 \\
5.0--10  & 0.35 \\
0.5--10  & 1.0\\
\hline                                    
\end{tabular}}
\medskip
(1) Energy band definition (in keV). 
(2) Flux scaling factor normalised to a unit flux in the 0.5$-$10~keV band, where $S_{\rm b}$ is the flux in the band and $S_{\rm 0.5-10~keV}$ is the flux in the 0.5$-$10~keV band. The values were obtained from an unabsorbed power-law spectrum of $\Gamma$~= 1.9 below 2~keV and $\Gamma$~= 1.6 above~2~keV.
\end{table}