Abstract

The aim of the present paper has been to establish explicit expressions for the ‘photometric perturbations’\(\mathfrak{P}_{2m}\) in the light changes of close eclipsing systems, arising from the mutual distortion of the components, for any type of eclipses — be these occultations or transits; partial, total, or annular — and exhibiting arbitrary distribution of brightness (limb- or gravity-darkening) over the apparent disc of the eclipsed star.

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