Title:
MODELLING OF X-RAY SOURCE OCCULTATION BY SOLAR DISK

 

Authors:
J. Sylwester and B. Sylwester
Abstract: The aim of present research is to investigate the occultation of solar X-ray sources seen near and behind the edge of solar disk. Understanding the occultation details allows for precise coalignment of deconvolved SXT images with sub-arcsec resolution in cases when the limb position can be used as the reference, i.e. for flares being occulted by the limb. Accurate image coalignment (down to 0.1 arcsec) is necessary in order to determine realistic maps of plasma temperature using filter ratio technique. Present results indicate also that a proper analysis of time history and apparent spectral evolution of sources located near the edge of solar disk need spectral influence of the occultation to be taken into account.
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