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On the Variation of the Orbital Period and the 67-Min Oscillations in EX Hydrae

Published online by Cambridge University Press:  12 April 2016

C. Sterken ,
N. Vogt ,
R.F. Freeth ,
H.D. Kennedy ,
B.F. Marino ,
A.A. Page  and
W.S.G. Walker
C. Sterken
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
N. Vogt
Affiliation:
Universitätssternwarte, Scheinerstrasse 1, D-8000 München 80, Germany
R.F. Freeth
Affiliation:
Department of Physics, The University of Auckland, Private Bag, Auckland, New Zealand
H.D. Kennedy
Affiliation:
Midway Observatory, Kelvin Grove College of Advanced Education, Victoria Park road, Brisbane, Qld 4059
B.F. Marino
Affiliation:
Queen Street 156, Northcote, Auckland 9, New Zealand
A.A. Page
Affiliation:
Mount Tamborine Observatory, 17 Hillhouse street, Aspley, Qld 4034
W.S.G. Walker
Affiliation:
Appleyard Crescent 14, Auckland, New Zealand

Extract

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We report the first results of an observational campaign consisting of coordinated photoelectric photometry of Ex Hya from four observatories at different geographical longitudes for a total of 146 hours in April 1979.

Ex Hya was monitored differentially for a total of 109 hours, partly simultaneously at different telescopes. The largest time-interval of uninterrupted observation is of nearly 18 hours. 68 times of eclipse, and 89 times of maxima in the 67-minute cycle have been obtained. Figure 1 is an 0-C diagram representing all residuals listed by Vogt et al. (1980), and those as obtained during this run.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 72: Cataclysmic Variables and Related Objects , 1983 , pp. 51 - 54
Copyright
Copyright © Reidel 1983

References

REFERENCES

Gilliland, R.L. 1982, Astrophys. J. 258, 576 CrossRefGoogle Scholar
Kruszewski, A., Mewe, R., Heise, J., Chlebowski, T., van Dyk, W., Bakker, R. 1982, in “Binary and Multiple Stars as Tracers of Stellar Evolution”, IAU Coll. 69, Kopal, Z. and Rahe, J. (eds.), Bamberg, D. Reidel Publishing Co., Holland, 457.CrossRefGoogle Scholar
Mumford, G.S. 1967, Astrophys. J. Suppl. 15, 1 Google Scholar
Vogt, N., Krzeminski, W., Sterken, C. 1980, Astron. Astrophys. 85, 106 Google Scholar