\begin{table}%t4
\caption {Parameters of the irradiation model for EX Hya and results of
the combined least-squares fit to the NaI$\lambda8183/8195$ and
the CaII$\lambda8498$~line profiles in 16 orbital phase bins.
%
\label{tab:parameters}}
%\centerline
 {\begin{tabular}{l@{\hspace{-1mm}}l@{\hspace{1mm}}l@{\hspace{3mm}}ll} 
\hline \hline \noalign{\smallskip}
No. &     Parameter             & \hspace{-3mm}Symbol & free~/ & Value~$\pm$~Error \\
         &            &        & fixed           &            \\[0.5ex]
\hline
\noalign{\medskip}
\multicolumn{5}{l}{\textit{(a) System parameters:}} \\[0.5ex]
P1   & Orbital period (s)    &   \porb                 &  fixed   &  5895.4           \\ 
P2   & Inclination           &   $i$                   &  fixed   &  $77.8\pm0.4^{\circ~1)}$              \\ 
P3   & Velocity amplitude (\kms) & $K_1$                &  fixed    &  $59.0\pm3.0^{~2)}$\\
P4   & Total mass (\msun)    &   $M$                   &  free    &  0.898$\pm $0.031    \\ 
P5   & Mass ratio $M_2/M_1$  &   $q$                   &      &  0.137$\pm 0.007^{~3)}$   \\ 
P6   & System velocity (\kms)& $\gamma$                &  free    &  \hspace{-2.0mm}$-58.2\pm1.0$\\
P7   & Phase shift           &$\Delta\phi_{98}$        &  free    & $0.018\pm0.001$\\ 
P8   & Phase shift           &$\Delta\phi_{67}$        &  fixed    &   \hspace{-2.0mm}$-0.20\pm0.06$\\
P9  & Ampl. of irradiation flux & $A_{\rm irr}$ &  fixed   &  0.15      \\ [0.5ex]
\multicolumn{5}{l}{\textit{(b) NaI$\lambda8183/8195$  absorption line parameters:}}\\[0.5ex]
P10   & Gravity darkening     & $y_\lambda$             &  fixed   &  0.61          \\ 
P11   & Limb darkening        & $c, d$          &  fixed   &  see text         \\[0.5ex] 
\multicolumn{5}{l}{\textit{(c) CaII and NaI emission line parameters:}} \\[0.5ex]
P12   & Disk half opening angle& $\beta$                 &  free    &  $\rm 2.1^{+1.0}_{-0.5}$     \\ 
P13  & Terminator, cos$~\vartheta$& $c_{\rm lim}$            &  free    &  \hspace{-2.4mm}$-0.06\pm0.06$ \\ 
P14  & Optical depth         & $\tau$                   &  fixed   &  $>$10         \\ 
P15  & Limb darkening        & $u_{\rm ~l,Ca}$       &  free   &  $0.42\pm0.24^{~4)}$        \\ 
P16  & $FWHM$   (\kms)          & $FW$                   &  fixed   &  10         \\[0.5ex] 
P17  & Normalized CaII       & $f_{\rm m}(\vartheta)$&  free   &  see Fig.~\ref{fig:eps}      \\ 
\ldots P24 & \hspace{3mm} emission line fluxes&&&\\[0.5ex] 
\noalign{\smallskip} \hline      
\end{tabular}}
\par
\smallskip
$^{1)}$ From $FWHM$ of the X-ray eclipse for given WD radius
$R_1(M_1)$.\\ $^{2)}$ From \citep{hoogerwerfetal04,belleetal03}, see text.\\
$^{3)}$ If $K_1$ is fixed in the fit, $q(M,K_1)$ is not an independent
fit parameter.\\ $^{4)}$ Error reflects the strong correlation between $u_{\rm ~l,Ca}$ and $M$.
\end{table}