Researchers used data reduction which includes steps:
Extracting Charon’s spectrum: The Point Spread Function (PSF) is used to describe how a point source of light (such as a star) is spread across an imaging system, such as a telescope and its detector. It is used for image resolution and sharpness. PSF technique yields a significantly enhanced signal-to-noise ratio
x,y are the spatial coordinates.
σ is the standard deviation of the Gaussian, related to the width of the blur.
r is the radial distance.
α, β are seeing dependent parameters
Correction of flux contamination: The minor blending has been observed of the fluxes from two binary components charon and pluto. Here Charon is on a diffraction spike of Pluto’s PSF.
Flux loss correction: Scientists used Near-Infrared Spectroscopy observations of the G2V-type solar standard star. They used cubic polynomial curves.Then flux is converted to radiance factor I/F.
BY studying spectral modeling of the surface, scientists showed that CO2 is present in pure crystalline form.
Hapke Radiative Transfer Theory is used to describe how light scatters, reflects, and absorbs when it hits the surface of a planet, moon, or asteroid. The theory is used for analyzing observations of surfaces covered with ice or dust.
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