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X-ray variability in the Orion nebula

Published online by Cambridge University Press:  23 September 2016

Jean-Pierre Caillault  and
Saeid Zoonematkermani
Jean-Pierre Caillault
Affiliation:
Department of Physics and Astronomy University of Georgia Athens, Georgia 30602 USA
Saeid Zoonematkermani
Affiliation:
Columbia Astrophysics Laboratory Columbia University New York, New York 10027 USA

Abstract

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We have examined each of the 172 EINSTEIN X–ray sources in Orion for both short (100–10,000 seconds) and long (1 day to 2 years) timescale variability. No strong flares were seen in 75,000 total seconds of observations. We compare the Orion variability results with those from the ρ Oph star–forming region, solar X–ray flares and dMe U–band flares.

Type
I Flare Stars Optical Observations and Flare Statistics
Information
Symposium - International Astronomical Union , Volume 137: Flare Stars in Star Clusters, Association and Solar Vicinity , 1990 , pp. 159 - 162
Copyright
Copyright © Kluwer 1990 

References

Caillault, J.–P., and Zoonematkermani, S. 1989, Ap. J., 338, L57.Google Scholar
Drake, J. F. 1971, Solar Physics, 16, 152.CrossRefGoogle Scholar
Giacconi, R., et al. 1979, Ap. J., 230, 540.Google Scholar
Ku, W. H.–M., and Chanan, G. A. 1979, Ap. J., 234, L59.CrossRefGoogle Scholar
Ku, W. H.-M., Righini–Cohen, G., and Simon, M. 1982, Science, 215, 61.Google Scholar
Kunkel, W. E. 1973, Ap. J. Suppl., 25, 1.Google Scholar
Montmerle, T., et al. 1983, Ap. J., 269, 182.CrossRefGoogle Scholar
Pravdo, S. H., and Marshall, F. E. 1981, Ap. J., 248, 591.CrossRefGoogle Scholar
Rosner, R., and Vaiana, G. S. 1978, Ap. J., 222, 1104.Google Scholar
Smith, M. A., Pravdo, S. H., and Ku, W. H.–M. 1983, Ap. J., 272, 163.Google Scholar
Svestka, Z. 1976, Solar Flares (Dordrecht:Reidel).Google Scholar
Wu, X.–Y., Hamilton, T. T., and Helfand, D. J. 1988, B. A. A. S., 20, 974.Google Scholar