Article: Macintosh, B; Chilcote, JK; Bailey, VP; De Rosa, R; Nielsen, E; Norton, A; Poyneer, L; Wang, J; Ruffio, JB; Graham, JR; Marois, C; Savransky, D; Veran, JP; “The Gemini Planet Imager: Looking back over five years and forward to the future”, Proceedings of SPIE, Adaptive Optics Systems VI, 10703
Abstract: The Gemini Planet Imager (GPI), a coronagraphic adaptive optics instrument designed for spectroscopy of extrasolar planets, had first light in 2013[13]. After five years, GPI has observed more than 500 stars, producing an extensive library of science images and associated telemetry that can be analyzed to determine performance predictors. We will present a summary of on-sky performance and lessons learned. The two most significant factors determining bright star contrast performance are atmospheric coherence time and the presence of dome seeing. With a possible move to Gemini North, we are planning potential upgrades including a pyramid-sensor based AO system with predictive control; we will summarize upgrade options and the science they would enable.