Open Access

Fig. 2

image

Download original image

SPHERE/IFS reduced data for HD 112810. Here, we show an image with all data epochs and all wavelengths co-added, with the GRAPHIC/PCA (left) and ANDROMEDA (right) algorithms applied to remove stellar speckles. In both cases, these are S/N maps; for GRAPHIC/PCA each annulus is scaled by the variance in that annulus, causing sharp transitions between concentric annuli. We tried several data reduction approaches and varied the values of tuned parameters. While a few bright spots are seen very close to the inner working angle, these are detected at low significance and are not at consistent locations between epochs – indicating that these are residual stellar speckles. The disk signal is not visible in any IFS data, either in the individual or in the co-added epochs.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.