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Non-Detection of kHz QPOs in GX 9+1 and GX 9+9

Published online by Cambridge University Press:  25 May 2016

Rudy Wijnands ,
Michiel van der Klis  and
Jan van Paradijs
Rudy Wijnands
Affiliation:
Astronomical Institute, University of Amsterdam
Michiel van der Klis
Affiliation:
Astronomical Institute, University of Amsterdam
Jan van Paradijs
Affiliation:
Astronomical Insitute, University of Amsterdam, and Department of Physics, University of Alabama at Huntsville

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In numerous low-mass X-ray binaries quasi-periodic oscillations (QPOs) between 300 and 1200 Hz have been discovered (the kHz QPOs; see van der Klis 1997 for a recent review on kHz QPOs). Here we present the search for kHz QPOs in the atoll sources GX 9+1 and GX 9+9.

Type
Session 3: Diagnostics of High Gravity Objects with X- and Gamma Rays
Information
Symposium - International Astronomical Union , Volume 188: The Hot Universe , 1998 , pp. 370 - 371
Copyright
Copyright © Kluwer 1998 

References

Miller, C., Lamb, F. K., & Psaltis, D. 1997, ApJ, submitted (astro-ph/9609157) Google Scholar
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Van der Klis, M. 1997, to appear in Proceedings of the NATO Advanced Study Institute “The many faces of neutron stars”, Lipari, Italy, 1996 (astro-ph/9710016) Google Scholar
Wijnands, R. A. D. et al. 1997, ApJ, 479L, 141 CrossRefGoogle Scholar