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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4881

Title: Low frequency quasi-periodic oscillations in the hard X-ray emission from Cygnus X-1
Authors: Paul, Biswajit
Agrawal, P.C.
Rao, A.R.
Issue Date: Dec-1998
Publisher: Indian Academy of Sciences, Bangalore, India
Citation: Journal of Astrophysics and Astronomy, 1998, Vol. 19, p55-61
Abstract: The observations of the black hole binary Cygnus X-1 were made in the energy band of 20 - 100 keV with a balloon-borne Xenon-filled multiwire proportional counter telescope on 5th April 1992. Timing analysis of the data revealed the presence of quasi-periodic oscillations (QPO) in the hard X-ray emission from the source. The QPO feature in the power density spectrum is broad with a peak at a frequency of 0.06 Hz. This result is compared with similar reports of QPOs in Cyg X-1 in soft and hard X-rays. Short time scale random intensity variations in the X-ray light curve are described with a shot noiuse model.
Description: Open Access
URI: http://hdl.handle.net/2289/4881
ISSN: 0250-6335
0973-7758 (Online)
Alternative Location: http://adsabs.harvard.edu/abs/1998JApA...19...55P
http://dx.doi.org/10.1007/BF02714891
Copyright: 1998 Indian Academy of Sciences, Bangalore, India
Appears in Collections:Research Papers (A&A)

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