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Issue A&A
Volume 424, Number 2, September III 2004
Page(s) L5 - L8
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:200400012



A&A 424, L5-L8 (2004)
DOI: 10.1051/0004-6361:200400012

Letter

First simultanous X-ray and optical observations of rapid variability of supercritical accretor SS433

M. Revnivtsev1, 2, R. Burenin2, S. Fabrika3, K. Postnov4, I. Bikmaev5, M. Pavlinsky2, R. Sunyaev1, 2, I. Khamitov6 and Z. Aslan6, 7

1  Max-Planck-Institute für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching bei München, Germany
    e-mail: mikej@mpa-garching.mpg.de
2  Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117810 Moscow, Russia
3  Special Astrophysical Observatory, Nizhnij Arkhyz, Karachaevo-Cherkesiya, 369167, Russia
4  Sternberg Astronomical Institute, 119992, Moscow, Russia
5  Kazan State University, Kremlevskaya str.18, 420008, Kazan, Russia
6  TUBITAK National Observatory, Akdeniz Universitesi Yerleskesi, 07058, Antalya, Turkey
7  Akdeniz University, Physics Dept. 07058, Antalya, Turkey

(Received 21 May 2004 / Accepted 24 June 2004 )

Abstract
We present results of first simultaneous optical and X-ray observations of peculiar binary system SS433. For the first time, chaotic variability of SS433 in the optical spectral band ( R band) on time scales as small as tens of seconds was detected. We find that the X-ray flux of SS433 is delayed with respect to the optical emission by approximately 80 s. Such a delay can be interpreted as the travel time of mass accretion rate perturbations from the jet base to the observed X-ray emitting region. In this model, the length of the supercritical accretion disk funnel in SS433 is ${\sim} 10^{12}$ cm.


Key words: accretion, accretion disks -- black hole physics -- instabilities -- stars: binaries:general -- X-rays: general -- X-rays: stars

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© ESO 2004


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