Table 4: Parameters of the irradiation model for EX Hya and results of the combined least-squares fit to the NaI $\lambda 8183/8195$ and the CaII $\lambda 8498$ line profiles in 16 orbital phase bins.
No.ParameterSymbolfree / Value $\pm$ Error
   fixed  
(a) System parameters:
P1Orbital period (s) $P_{\rm orb}$fixed 5895.4
P2Inclinationifixed $77.8\pm0.4^{\circ~1)}$
P3Velocity amplitude (km s-1)K1fixed $59.0\pm3.0^{~2)}$
P4Total mass ($M_\odot$)Mfree 0.898$\pm$0.031
P5Mass ratio M2/M1q  0.137 $\pm 0.007^{~3)}$
P6System velocity (km s-1)$\gamma$free $-58.2\pm1.0$
P7Phase shift $\Delta\phi_{98}$free $0.018\pm0.001$
P8Phase shift $\Delta\phi_{67}$fixed $-0.20\pm0.06$
P9Ampl. of irradiation flux $A_{\rm irr}$fixed 0.15
(b) NaI $\lambda 8183/8195$ absorption line parameters:
P10Gravity darkening$y_\lambda$fixed 0.61
P11Limb darkeningc, dfixed see text
(c) CaII and NaI emission line parameters:
P12Disk half opening angle$\beta $free $\rm 2.1^{+1.0}_{-0.5}$
P13Terminator, cos $~\vartheta$ $c_{\rm lim}$free $-0.06\pm0.06$
P14Optical depth$\tau$fixed >10
P15Limb darkening $u_{\rm ~l,Ca}$free $0.42\pm0.24^{~4)}$
P16FWHM (km s-1)FWfixed 10
P17Normalized CaII $f_{\rm m}(\vartheta)$free see Fig. 10
...P24emission line fluxes    
1) From FWHM of the X-ray eclipse for given WD radius R1(M1).
2) From (Hoogerwerf et al. 2004; Belle et al. 2003), see text.
3) If K1 is fixed in the fit, q(M,K1) is not an independent fit parameter.
4) Error reflects the strong correlation between $u_{\rm ~l,Ca}$ and M.

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