Fig. 2.
Typical ADI sequence from the VLT/SPHERE-IRDIS instrument: (a) Examples of temporal frames; (b) two spatio-temporal slices cut along the solid and dashed lines of (a) emphasizing the spatial variations of the structure of the signal; (c) estimated covariance matrices for four regions of interest (ROIs) at different angular separations s with the host star. Data set: HR 4796A, see Sect. 3.3.1 for observing conditions.
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