Spectroscopic search for new SW Sextantis stars in the 3-4 hour orbital period range -- I

P. Rodriguez-Gil, L. Schmidtobreick, B. T. Gaensicke

[Abridged] We report on time-resolved optical spectroscopy of ten non-eclipsing nova-like cataclysmic variables in the orbital period range between 3 and 4 hours. Of the ten system…