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Proceedings Article

Status and performance of the Gemini Planet Imager adaptive optics system

[+] Author Affiliations
Vanessa P. Bailey, Bruce A. Macintosh, Katherine B. Follette

Stanford Univ. (United States)

Lisa A. Poyneer, S. Mark Ammons, David W. Palmer

Lawrence Livermore National Lab. (United States)

Dmitry Savransky

Cornell Univ. (United States)

Jason J. Wang, Robert J. De Rosa

Univ. of California, Berkeley (United States)

Thomas Hayward, Fredrik T. Rantakyrö

Gemini Observatory (Chile)

Patrick Ingraham, Sandrine Thomas

Large Synoptic Survey Telescope (United States)

Jérôme Maire

Univ. of Toronto (Canada)

Marshall D. Perrin

Space Telescope Science Institute (United States)

Abhijith Rajan

Arizona State Univ. (United States)

Jean-Pierre Véran

NRC Herzberg Institute of Astrophysics (Canada)

Proc. SPIE 9909, Adaptive Optics Systems V, 99090V (July 26, 2016); doi:10.1117/12.2233172
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From Conference Volume 9909

  • Adaptive Optics Systems V
  • Enrico Marchetti; Laird M. Close; Jean-Pierre Véran
  • Edinburgh, United Kingdom | June 26, 2016

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.
Citation

Vanessa P. Bailey ; Lisa A. Poyneer ; Bruce A. Macintosh ; Dmitry Savransky ; Jason J. Wang, et al.
" Status and performance of the Gemini Planet Imager adaptive optics system ", Proc. SPIE 9909, Adaptive Optics Systems V, 99090V (July 26, 2016); doi:10.1117/12.2233172; http://dx.doi.org/10.1117/12.2233172


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