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28 March 2024
 
  » arxiv » astro-ph/0404479

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Coordinated INTEGRAL and optical observations of SS433
A.M. Cherepashchuk ; R.A. Sunyaev ; S.N. Fabrika ; S.V. Molkov ; E.A. Barsukova ; E.A. Antokhina ; T.R. Irsmambetova ; I.E. Panchenko ; K.A. Postnov ; E.V. Seifina ; N.I. Shakura ; A.N. Timokhin ; I.F. Bikmaev ; N.A. Sakhibullin ; Yu.N. Gnedin ; A.A. Arkharov ; V.M. Larionov ;
Date 24 Apr 2004
Subject astro-ph
Affiliation1 - SAI Moscow, 2 - IKI Moscow, 3 - SAO Nizhnij Arkhyz, 4 - Kazan State University, 5 - Pulkovo Observatory, St. Petersburg, 6 - St.Petersburg University
AbstractResults of simultaneous {it INTEGRAL} and optical observations of galactic microquasar SS433 in May 2003 are presented. The analysis of the X-ray and optical eclipse duration and hard X-ray spectra obtained by {it INTEGRAL} together with optical spectroscopy obtained on the 6-m telescope allows us to construct a model of SS433 as a massive X-ray binary. X-ray eclipse in hard X-rays has a depth of $sim 80%$ and extended wings. The optical spectroscopy allows us to identify the optical companion as a A5-A7 supergiant and to measure its radial velocity semi-amplitude $K_v=132$ km/s. A strong heating effect in the optical star atmosphere is discovered spectroscopically. The observed broadband X-ray spectrum 2-100 keV can be described by emission from optically thin thermal plasma with $kTsim 15-20 keV$
Source arXiv, astro-ph/0404479
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