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35 papers · 2 filters
Apodization in high-contrast long-slit spectroscopy. II. Concept validation and first on-sky results with VLT/SPHERE
A. Vigan, M. N'Diaye, K. Dohlen +20
Spectral characterization of young, giant exoplanets detected by direct imaging is one of the tasks of the new generation of high-contrast imagers. For this purpose, the VLT/SPHERE…
The Mid-Infrared Instrument for the James Webb Space Telescope: IV. The Low Resolution Spectrometer
S. Kendrew, S. Scheithauer, P. Bouchet +13
The Low Resolution Spectrometer of the MIRI, which forms part of the imager module, will provide R~100 long-slit and slitless spectroscopy from 5 to 12 micron. The design is optimi…
WFIRST-AFTA Coronagraphic Operations: Lessons Learned from the Hubble Space Telescope and the James Webb Space Telescope
John H. Debes, Marie Ygouf, Elodie Choquet +8
The coronagraphic instrument currently proposed for the WFIRST-AFTA mission will be the first example of a space-based coronagraph optimized for extremely high contrasts that are r…
SDSS-IV/MaNGA: Spectrophotometric Calibration Technique
Renbin Yan, Christy Tremonti, Matthew A. Bershady +19
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA), one of three core programs in the Sloan Digital Sky Survey-IV (SDSS-IV), is an integral-field spectroscopic (IFS) surve…
Active compensation of aperture discontinuities for WFIRST-AFTA: analytical and numerical comparison of propagation methods and preliminary results with a WFIRST-AFTA-like pupil
Johan Mazoyer, Laurent Pueyo, Colin Norman +3
The new frontier in the quest for the highest contrast levels in the focal plane of a coronagraph is now the correction of the large diffractive artifacts effects introduced at the…
Archival Legacy Investigations of Circumstellar Environments (ALICE): Statistical assessment of point source detections
É. Choquet, L. Pueyo, R. Soummer +5
The ALICE program, for Archival Legacy Investigation of Circumstellar Environment, is currently conducting a virtual survey of about 400 stars, by re-analyzing the HST-NICMOS coron…