TITLE:
RS Oph: A new look at the evolution of 2006 outburst in X-rays

AUTHOR:
Natalia Shagatova

ABSTRACT:
RS Oph is a symbiotic recurrent nova that experiences outbursts 
roughly every 20 years. The last outburst in the 2006 year was 
observed by instruments operating from the X-ray to radio wavelength 
range. Here, we present preliminary results of the analysis 
of the spectra obtained by Swift's X-ray Telescope during and after 
the 2006 outburst. In comparison to previous studies, our aim was 
to obtain more detailed model of the column density evolution 
in order to obtain a deeper insight into the problematics 
of the nature of the supersoft spectral component. Our models suggest 
that the high-column-density partially covering absorber, located near 
the hot white dwarf at the beginning of the outburst, was removed from 
our line of sight with the start of the supersoft phase. This result 
supports the hypothesis that the spectra during supersoft phase are 
dominated by the radiation from the "unveiled" white dwarf.