The Gemini Planet Imager Coronagraph Testbed Preliminary Performance Results

Details The Gemini Planet Imager Coronagraph Testbed Preliminary Performance Results The Gemini Planet Imager Coronagraph Testbed Preliminary Performance Results

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21560410r&link_type=abstract

American Astronomical Society, AAS Meeting #215, #604.10; Bulletin of the American Astronomical Society, Vol. 36, p.1128

Physics

Optics

Scientific paper

The Gemini Planet Imager (GPI) is a new science instrument being developed and slated for first light early 2011 on the twin 8m Gemini telescopes. Operating in the near infrared, this ground-based, extreme Adaptive Optics (ExAO) coronographic instrument will provide the ability to detect, characterize and analyze young (< 2GYr), self-luminous, extrasolar planets with brightness contrast ratios ≤ 10-7 when compared to their parent star. The coronagraph subsystem includes a pupil apodization, a hard-edged focal plane mask as well as a Lyot stop. Preliminary results indicate that the testbed is performing at very high contrast, having achieved broadband contrasts (H-band) below 10-6 at separations > 5λ/D. Fraunhoffer and Fresnel propagation modeling were used to analyze the testbed results.

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