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Line Structures in the X-ray Spectra of Cygnus X-2 Observed With EXOSAT

Published online by Cambridge University Press:  12 April 2016

P. E. Freeman ,
S. M. Kahn ,
L. Chiappetti ,
E. G. Tanzi ,
A. Ciapi ,
L. Maraschi ,
A. Treves ,
E. G. Branduardi-Raymont  and
E. N. Ercan
P. E. Freeman
Affiliation:
University of California, Berkeley, CA, USA
S. M. Kahn
Affiliation:
University of California, Berkeley, CA, USA
L. Chiappetti
Affiliation:
Institute of Cosmic Physics – CNR, Milan, ITA
E. G. Tanzi
Affiliation:
Institute of Cosmic Physics – CNR, Milan, ITA
A. Ciapi
Affiliation:
University of Milan, Milan, ITA
L. Maraschi
Affiliation:
University of Milan, Milan, ITA
A. Treves
Affiliation:
University of Milan, Milan, ITA
E. G. Branduardi-Raymont
Affiliation:
Milliard Space Science Laboratory, London, GBR
E. N. Ercan
Affiliation:
Bogazici University, Bebek, Istanbul, TUR

Abstract

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Cygnus X-2 was observed with EXOSAT at five phases of a single orbital cycle in September of 1983. We will summarize the results of spectral fits of the LE + ME (Argon) data in terms of a superposition of thermal bremstrahlung and blackbody components. During the first observation a grating spectrum was obtained and this is described in some detail. The GSPC data are used to investigate the presence of iron features, and their behavior during dips.

Type
5. Compact Binaries
Information
International Astronomical Union Colloquium , Volume 115: High Resolution X-ray Spectroscopy of Cosmic Plasmas , 1990 , pp. 197 - 200
Copyright
Copyright © Cambridge University Press 1990

References

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