26 July 2016 Status and performance of the Gemini Planet Imager adaptive optics system
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Abstract
The Gemini Planet Imager is a high-contrast near-infrared instrument specifically designed to image exoplanets and circumstellar disks over a narrow field of view. We use science data and AO telemetry taken during the first 1.5 yr of the GPI Exoplanet Survey to quantify the performance of the AO system. In a typical 60 sec H-band exposure, GPI achieves a 5σ raw contrast of 10−4 at 0.4"; typical final 5σ contrasts for full 1 hr sequences are more than 10 times better than raw contrasts. We find that contrast is limited by bandwidth wavefront error over much of the PSF. Preliminary exploratory factor analysis can explain 60{70% of the variance in raw contrasts with combinations of seeing and wavefront error metrics. We also examine the effect of higher loop gains on contrast by comparing wavefront error maps reconstructed from AO telemetry to concurrent IFS images. These results point to several ways that GPI performance could be improved in software or hardware.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vanessa P. Bailey, Vanessa P. Bailey, Lisa A. Poyneer, Lisa A. Poyneer, Bruce A. Macintosh, Bruce A. Macintosh, Dmitry Savransky, Dmitry Savransky, Jason J. Wang, Jason J. Wang, Robert J. De Rosa, Robert J. De Rosa, Katherine B. Follette, Katherine B. Follette, S. Mark Ammons, S. Mark Ammons, Thomas Hayward, Thomas Hayward, Patrick Ingraham, Patrick Ingraham, Jérôme Maire, Jérôme Maire, David W. Palmer, David W. Palmer, Marshall D. Perrin, Marshall D. Perrin, Abhijith Rajan, Abhijith Rajan, Fredrik T. Rantakyrö, Fredrik T. Rantakyrö, Sandrine Thomas, Sandrine Thomas, Jean-Pierre Véran, Jean-Pierre Véran, } "Status and performance of the Gemini Planet Imager adaptive optics system", Proc. SPIE 9909, Adaptive Optics Systems V, 99090V (26 July 2016); doi: 10.1117/12.2233172; https://doi.org/10.1117/12.2233172
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