4 Conclusions

The 1WGAJ1958.2+3232 is found to be a "textbook'' Intermediate Polar. It has an orbital period $P_{\rm orb}=4\hbox{$.\!\!^{\rm h}$ }36$ above the period gap, as have the vast majority of IPs. It exhibits X-ray and optical coherent pulsations of the order of $\sim$0.05  $P_{\rm orb}$, undoubtedly originating from asynchronous spin of the magnetic WD in a close binary system. The beat period in optical light is also detectable. This is another characteristic of Intermediate Polars.

Other orbital parameters derived from the assumption that the system obeys the $P_{\rm orb} \sim M_{\rm 2}$ relation for CVs also agree with accumulated data on other IPs and theoretical aspects (Warner 1995; Patterson 1994, see also URL). The radial velocity curves, the light curve and the Doppler tomography confirm the presence of an accretion ring around the WD and the existence of hot spots caused by heating of parts of the disk by the X-ray beam and from interaction with the mass transfer stream.

Acknowledgements

This work was supported in part by CONACYT project 25454-E and DGAPA project IN-118999.