S 10932 Comae - a jumping jack among the cataclysmic variables.

Details S 10932 Comae - a jumping jack among the cataclysmic variables. S 10932 Comae - a jumping jack among the cataclysmic variables.

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...325..994r&link_type=abstract

Astronomy and Astrophysics, v.325, p.994-1000

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7

Stars: Variable: Others, X-Rays: Stars, Stars: Novae, Cataclysmic Variables

Scientific paper

We analyse photometric and spectroscopic observations of the optical counterpart of the X-ray source RX J1239.5+2108 (hereafter named S 10932 Comae Berenices), which proved to be a nova-like variable with deep eclipsing minima. It is variable on a variety of timescales. In addition to a ``normal brightness state'', in which S 10932 spends most of its time, there are eruption states (like in dwarf novae) as well as low states, more than 1 mag fainter than the normal state. In many respects, its optical behaviour resembles that of an intermediate polar. But besides the orbital period of 2^h^05^m^ we did not find any other periodicity which could be ascribed to the rotation of the white dwarf (the main criterion of an object to be an intermediate polar).

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