Time-resolved photometry and spectroscopy of the new deeply-eclipsing SW   Sextantis star HS 0728+6738
  We present time-resolved optical spectroscopy and photometry, and far-ultraviolet spectroscopy of HS 0728+6738, a cataclysmic variable discovered in the Hamburg Quasar Survey. We show that the system is a new eclipsing member of the SW Sex class of CVs with an orbital period of 3.21 hours. We derive an orbital inclination of ~85 +- 4 degrees from the average eclipse profile, making HS 0728+6738 the highest inclination SW Sex star known. The optical and far-ultraviolet emission lines are not or only weakly occulted during the eclipse, indicating the presence of line-emission sites either far outside the Roche lobe of the primary or, more likely, above the orbital plane of the binary. The photometric light curves exhibit fast variability with a period of \~7 min, which might be related to the spin of the white dwarf. 
P. Rodriguez-Gil (1), B. T. Gaensicke (1), H. Barwig (2), H.-J. Hagen   (3), D. Engels (3) ((1) University of Warwick, (2) U...