\begin{table}%t1
%\centering
\par
\caption{Default spectral models adopted for different categories of sources.
See XSPEC manual (Arnaud \cite{Arn96}; {\tt http://xspec.gsfc.nasa.gov}) for  precise descriptions
of the spectral models.}\begin{tabular}{lcccccc}\hline\hline
Source category & model &$N_{\rm H}$ &$\Gamma$1&$\Gamma$2&$E_{\rm cut}$ &  $E_{\rm fold}$ or  $E_{\rm break}$$^{\dagger}$\\
                &       &($10^{22}$ cm$^{-2}$)  & & & [keV] & [keV]\\\hline
{\bf X-ray binaries}\\
LMXB&wabs*cutoff       &1.0   &1.7       & --    & 5 & --\\
LMXB with hard-tail&wabs*(cutoff+powerlaw)
                        &1.0   &1.7       &2.5    &10 & --\\
HMXB &wabs*highecut*powerlaw
                        &1.0   &1.0       &--     &10     &15\\
{\bf AGN}\\
Seyfert 1&wabs*cutoff  &1.0   &1.7       & --  &100 & --\\
Seyfert 2I&wabs*cutoff  &10.0  &1.7       & --  &100 & --\\
Blazar&wabs*cutoff      &1.0   &1.7       & --  &100 & --\\
Quasar&wabs*cutoff      &1.0   &1.7       & --  &100 & --\\
{\bf Clusters of Galaxies}&wabs*cutoff             &1.0   &1.7       & --  &10 & --\\
{\bf Unidentified}\\
X-ray sources&wabs*cutoff
                        &1.0  & 1.7       &--&10  & --\\
COMPTEL sources&wabs*bknpower
                        &100  &$-$1.5       &2.1  & -- & 1000\\
EGRET sources&wabs*bknpower
                        &100 &$-$1.5       &2.1  & -- & 10~000\\\hline
\multicolumn{2}{l}{$^\dagger$$E_{\rm fold}$ for highecut model and $E_{\rm break}$ for bknpower model.}\\
\end{tabular}
\end{table}