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Institut für Astronomie und Astrophysik

Abteilung Astronomie

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Preprint 11a/03

Short-Term Radio-X-ray Correlations of Cygnus X-1

T. Gleissner (1), J. Wilms (1,2), G. G. Pooley (3), M. A. Nowak (4), K. Pottschmidt (5,6), S. Markoff (4), M. Klein-Wolt (7), R. P. Fender (7), R. Staubert (1)

(1) Institut für Astronomie und Astrophysik - Abt. Astronomie, Universität Tübingen, Sand 1, 72076 Tübingen, Germany
(2) current address: Department of Physics, University of Warwick, Coventry CV4 7AL, UK
(3) Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, UK
(4) MIT-CXC, NE80-6077, 77 Massachusetts Ave., Cambridge, MA 02139, USA
(5) Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, 85748 Garching, Germany
(6) INTEGRAL Science Data Centre, Chemin d'Ecogia 16, 1290 Versoix, Switzerland
(7) Astronomical Institute "Anton Pannekoek", University of Amsterdam, and Center for High Energy Astrophysics, Kruislaan 403, 1098 SJ, Amsterdam, the Netherlands

To be published in: Proc. IAU Colloquium 194 Compact binaries in The Galaxy and beyond, in Revista Mexicana de Astronomia y Astrofisica, Conference Series

Abstract. We analyze simultaneous radio-X-ray data of Cygnus X-1 from the Ryle telescope (RT) and RXTE over more than 4 a. We show that apparent correlations on short time scales in the lightcurves of Cyg X-1 are probably the coincidental outcome of white noise statistics.

Preprint (56 kb PDF file including figures)
Astrophysics (astro-ph): astro-ph/0312636

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