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Krzeminsky’s Optical Candidate for Cen X-3

Published online by Cambridge University Press:  25 April 2016

D. T. Wickramasinghe ,
N. V. Vidal  and
M. S. Bessell
D. T. Wickramasinghe
Affiliation:
Mt Stromlo and Siding Spring Observatory, Research School of Physical Sciences, Australian National University
N. V. Vidal
Affiliation:
Mt Stromlo and Siding Spring Observatory, Research School of Physical Sciences, Australian National University
M. S. Bessell
Affiliation:
Mt Stromlo and Siding Spring Observatory, Research School of Physical Sciences, Australian National University
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Extract

Cen X-3 and Her X-1 are the only two X-ray binaries which are known to pulsate periodically (at 4.8s and 1.2s respectively) in the X-ray region. The latter was identified with a fourteenth magnitude light and spectrum variable HZ Her, which was subsequently found to exhibit 1.24 second optical pulsations during certain phases. The possibility that Cen X-3 may prove to be as interesting an object optically has resulted in a wide spread search for its optical counterpart.

Type
X-Ray Astronomy
Information
Publications of the Astronomical Society of Australia , Volume 2 , Issue 5 , September 1974 , pp. 289 - 290
Copyright
Copyright © Astronomical Society of Australia 1974

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References

Krzeminsky, W., IAUC No. 2612 (1973).Google Scholar
Strittmatter, P. A., Scott, J., Whelan, J., Wickramasinghe, D. T., and Woolf, N. J., Astron. Astrophys., 25, 275 (1973).Google Scholar
Van den Heuvel, E. P. J., and Heise, J., Nature, 239, 67 (1972).Google Scholar
Vidal, N. V., Wickramasinghe, D. T., Peterson, B. A., and Bessell, M. S., Astrophys. J. Lett, (in press) (1974).Google Scholar
Wickramasinghe, D. T., Bessell, M. S., and Vidal, N. V., IAUC No. 2631 (1974).Google Scholar