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Beyond FRiM, ASAP: a family of sparse approximation for covariance matrices and preconditioners
Éric Thiébaut, Michel Tallon, Samuel Thé +1
The FRiM fractal operator belongs to a family of operators, called ASAP, defined by an ordered selection of nearest neighbors. This generalization provides means to improve upon th…
Characterization of stellar companion from high-contrast long-slit spectroscopy data: The EXtraction Of SPEctrum of COmpanion (EXOSPECO) algorithm
Samuel Thé, Éric Thiébaut, Loïc Denis +4
High-contrast long-slit spectrographs can be used to characterize exoplanets. High-contrast long-slit spectroscopic data are however corrupted by stellar leakages which largely dom…
REXPACO: an algorithm for high contrast reconstruction of the circumstellar environment by angular differential imaging
Olivier Flasseur, Samuel Thé, Loïc Denis +2
Aims. The purpose of this paper is to describe a new post-processing algorithm dedicated to the reconstruction of the spatial distribution of light received from off-axis sources,…