Coronagraph; Direct imaging; Exoplanet; Integral field spectrograph; Wavefront estimation; Electronic, Optical and Magnetic Materials; Condensed Matter Physics; Computer Science Applications; Applied Mathematics; Electrical and Electronic Engineering
Abstract :
[en] Future space-based observatories such as WFIRST will be equipped with high contrast imaging instruments designed to study extrasolar planets and disks in the absence of atmospheric perturbations. One of the most efficient techniques to achieve this goal is the combination of wavefront control and broadband coronagraphy. Being able to achieve a high contrast over a wide spectral bandwidth allows us to characterize the chemical composition of exoplanet atmospheres using an integral field spectrograph (IFS). In this paper, we report on the development of such an IFS for the High Contrast Imaging Lab (HCIL) at Princeton University, downstream of a Shaped Pupil coronagraph. Our final lensletbased design calls for the light in an 18% band around 660 nm to be dispersed with a spectral resolution of 50. We also present our new laboratory control software written in Python, allowing the import of open-source packages such as CRISPY to ultimately reconstruct 3D datacubes from IFS spatio-spectral science images. Finally, we show and discuss our preliminary first light results, reaching a contrast of ~10-5 using in-house focal-plane wavefront control and estimation algorithms with two deformable mirrors.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Delacroix, Christian ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Planetary & Stellar systems Imaging Laboratory ; Princeton University, Mechanical and Aerospace Engineering, Princeton, United States
Sun, He; Princeton University, Mechanical and Aerospace Engineering, Princeton, United States
Galvin, Michael; Princeton University, Mechanical and Aerospace Engineering, Princeton, United States
Limbach, Mary Anne; Exoplanet Consulting, United States
Groff, Tyler; NASA Goddard Space Flight Center, Greenbelt, United States
Rizzo, Maxime; NASA Goddard Space Flight Center, Greenbelt, United States
Grossman, Matthew; Princeton University, Mechanical and Aerospace Engineering, Princeton, United States
Mumm, Katherine; Princeton University, Mechanical and Aerospace Engineering, Princeton, United States
Kasdin, N. Jeremy; Princeton University, Mechanical and Aerospace Engineering, Princeton, United States
Language :
English
Title :
First light of the High Contrast Integral Field Spectrograph (HCIFS)
Publication date :
2018
Event name :
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Event place :
Austin, Usa
Event date :
10-06-2018 => 15-06-2018
Main work title :
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Editor :
Geyl, Roland
Publisher :
SPIE
ISBN/EAN :
978-1-5106-1965-4
Peer reviewed :
Editorial reviewed
Funders :
NASA - National Aeronautics and Space Administration
Funding number :
NASA Grant No. 80NSSC17K096(G7SFC)
Funding text :
4D Technology; Andor Technology, Ltd.; Astronomical Consultants and Equipment, Inc.; Giant Magellan Telescope ; The Society of Photo-Optical Instrumentation Engineers (SPIE)
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