\begin{table}%T1
\par
%\centering
\par
\caption{Conversion factor ($A$) between the RXTE/PCA count rates~($CR$) and the source energy flux ($F$) as a function of the source 
spectral slope ($\Gamma$):
$F$~($10^{-11}$~erg~s$^{-1}$~cm$^{-2})=A\times CR$~(cnt~s$^{-1}$).
\label{rates_fluxes}}
\begin{tabular}{lllllll}
\hline\hline
	&       $-1$&     $-0.5$&   0&      1&      2&      3\\
\hline
3--8~keV&       0.67&   0.88&   1.00&   1.04&   1.03&   1.02\\
8--20~keV&      2.71&   2.89&   2.87&   2.45&   1.92&   1.51\\
3--20~keV&      2.29&   2.39&   2.27&   1.75&   1.33&   1.12\\
\hline
\end{tabular}
\end{table}