Charge-coupled device-photometric observations of SS433 in 2003-2005
Charge-coupled device-photometric BVRI observations of SS433 perfomed in Crimea in 2004-2005 are presented. Analysis of the variations in the colour indices B-V and V-R was made on different timescales. The 'colour-magnitude' V-(V-R) relations for both rapid and orbital variabilities possess typical features; the colour V-R decreases when the brightness of V increases. It has been shown that the object's reddening with decreasing brightness is caused not only by eclipses but also by its own variability. The behaviour of colour indices during the night can be explained by the interaction of the relativistic jets with the photosphere around the accretion disc.
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Document Type: Research Article
Affiliations: Sternberg Astronomical Institute, Moscow University, Moscow, Russia
Publication date: 2007-02-01