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High-order myopic coronagraphic phase diversity (COFFEE) for wave-front control in high-contrast imaging systems
B. Paul, L. M. Mugnier, J. -F. Sauvage +1
The estimation and compensation of quasi-static aberrations is mandatory to reach the ultimate performance of high-contrast imaging systems. COFFEE is a focal plane wave-front sens…
Performances tests on the SPHERE-IFS
Dino Mesa, Raffaele Gratton, Riccardo U. Claudi +13
Until now, just a few extrasolar planets (~30 out of 860) have been found through the direct imaging method. This number should greatly improve when the next generation of High Con…
IRDIS, the dual-band imager camera of SPHERE: testing the performances in laboratory
A. Zurlo, A. Vigan, C. Moutou +12
Next year the second generation instrument SPHERE will begin science operations at the Very Large Telecope (ESO). This instrument will be dedicated to the search for exoplanets thr…
Coronagraphic phase diversity: performance study and laboratory demonstration
B. Paul, L. M. Mugnier, J. -F. Sauvage
The final performance of current and future instruments dedicated to exoplanet detection and characterization (such as SPHERE on the European Very Large Telescope, GPI on Gemini No…
Speckle temporal stability in XAO coronagraphic images II. Refine model for quasi-static speckle temporal evolution for VLT/SPHERE
P. Martinez, M. Kasper, A. Costille +4
Observing sequences have shown that the major noise source limitation in high-contrast imaging is due to the presence of quasi-static speckles. The timescale on which quasi-static…