A New Algorithm for Point-Spread Function Subtraction in High-Contrast Imaging: A Demonstration with Angular Differential Imaging*

@article{Lafrenire2007ANA,
  title={A New Algorithm for Point-Spread Function Subtraction in High-Contrast Imaging: A Demonstration with Angular Differential Imaging*},
  author={David Lafreni{\`e}re and Christian Marois and Ren{\'e} Doyon and Daniel Nadeau and {\'E}tienne Artigau},
  journal={The Astrophysical Journal},
  year={2007},
  volume={660},
  pages={770-780}
}
Direct imaging of exoplanets is limited by bright quasi-static speckles in the point-spread function (PSF) of the central star. This limitation can be reduced by subtraction of reference PSF images. We have developed an algorithm to construct an optimized reference PSF image from a set of reference images. This image is built as a linear combination of the reference images available, and the coefficients of the combination are optimized inside multiple subsections of the image independently to… 
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