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Revised astrometric calibration of the Gemini Planet Imager

Duchêne, Gaspard; Esposito, Thomas M.; Oppenheimer, Rebecca +49 more

We present a revision to the astrometric calibration of the Gemini Planet Imager (GPI), an instrument designed to achieve the high contrast at small angular separations necessary to image substellar and planetary-mass companions around nearby, young stars. We identified several issues with the GPI data reduction pipeline (DRP) that significantly a…