Optical identification of a new cataclysmic variable from integral all   sky survey: IGR J08390--4833
  We have optically identified a recently discovered INTEGRAL source, IGR J08390--4833, with a cataclysmic variable, i.e. an accreting white dwarf in a binary system. The spectrum exhibits a rising blue continuum together with Balmer and HeII emission lines. Analysis of the light curve of the source shows clear presence of intrinsic variability on a time scale of the order of an hour, although we do not claim that this variability is periodic. Therefore we are not yet able to classify the object into a specific CV subclass. 
M.Revnivtsev (1,2,3), A.Kniazev (4,5), S.Sazonov (1,2), R.Burenin (2),   A.Tekola (4), D.A.H.Buckley (4), M.L.Pretorius (4),...