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A Search for the Signature of the Diffuse Soft X-ray Background in the ROSAT Wide-Field Camera All-Sky Survey

Published online by Cambridge University Press:  12 April 2016

R.G. West ,
R. Willingale ,
J.P. Pye  and
T.J. Sumner
R.G. West
Affiliation:
Department of Physics & Astronomy, University of Leicester, University Road, Leicester LEI 7RH, UK
R. Willingale
Affiliation:
Department of Physics & Astronomy, University of Leicester, University Road, Leicester LEI 7RH, UK
J.P. Pye
Affiliation:
Department of Physics & Astronomy, University of Leicester, University Road, Leicester LEI 7RH, UK
T.J. Sumner
Affiliation:
Department of Physics, Imperial College, London, UK

Abstract

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We present the results of an attempt to locate the signature of the diffuse soft X-ray background in the ROSAT Wide-Field Camera (WFC) all-sky survey. After removal of non-cosmic background sources (eg. energetic charged particles), the field-of-view integrated count rate in the WFC S1a filter (90–185 eV) shows no consistent variation with Galactic latitude or longitude. We place limits on the signal from the soft X-ray background (SXRB) in the WFC, and show that these limits conflict with the observations of the Wisconsin Sky Survey if the SXRB in this energy range is assumed to be produced by a thermal plasma of cosmic abundance and a temperature T ~ 106 K within d ~ 100 pc of the Sun.

Type
V. The Interstellar Medium and Diffuse Background
Information
International Astronomical Union Colloquium , Volume 152: Astrophysics in the Extreme Ultraviolet , 1996 , pp. 289 - 293
Copyright
Copyright © Kluwer 1996

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