Titlebook: Cataclysmic Variables and Related Objects; Proceedings of the 7 Mario Livio,Giora Shaviv Conference proceedings 1983 D. Reidel Publishing C

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Cataclysmic Variables and Related Objects978-94-009-7118-9Series ISSN 0067-0057 Series E-ISSN 2214-7985

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Photometric and Spectroscopic Observations of the Cataclysmic Variable AC Cancri,her studied in detail on the bases of UBV- colours, multi-channel photoelectric light curves and image-tube spectrograms which were newly obtained at Tokyo Astronomical Observatory. The result of analysis of these materials for the nature of the cataclysmic variable is presented.

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Recent Spectroscopy of X-Ray Sources and Systems Related to Cataclysmic Variables: II,n 0 or WR star and a black hole surrounded by a luminous precessing accretion disk (from which emanate spectacular relativistic jets); the second, GK Per, is a classical old nova consisting of a slightly evolved K2 star and an unseen white dwarf companion surrounded by an accretion disk which is less luminous than the K2 star.