A simple method for correcting spatially resolved solar intensity oscillation observations for variations in scattered light

Physics

Scientific paper

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Helioseismology, Light Scattering, Luminous Intensity, Solar Interior, Solar Oscillations, Point Spread Functions, Solar Instruments, Spatial Distribution, Spherical Harmonics

Scientific paper

A measurement of the intensity distribution in an image of the solar disk will be corrupted by a spatial redistribution of the light that is caused by the earth's atmosphere and the observing instrument. A simple correction method is introduced here that is applicable for solar p-mode intensity observations obtained over a period of time in which there is a significant change in the scattering component of the point spread function. The method circumvents the problems incurred with an accurate determination of the spatial point spread function and its subsequent deconvolution from the observations. The method only corrects the spherical harmonic coefficients that represent the spatial frequencies present in the image and does not correct the image itself.

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