14 July 2014 Gemini planet imager observational calibrations III: empirical measurement methods and applications of high-resolution microlens PSFs
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Abstract
The newly commissioned Gemini Planet Imager (GPI) combines extreme adaptive optics, an advanced coronagraph, precision wavefront control and a lenslet-based integral field spectrograph (IFS) to measure the spectra of young extrasolar giant planets between 0.9-2.5 μm. Each GPI detector image, when in spectral model, consists of ~37,000 microspectra which are under or critically sampled in the spatial direction. This paper demonstrates how to obtain high-resolution microlens PSFs and discusses their use in enhancing the wavelength calibration, flexure compensation and spectral extraction. This method is generally applicable to any lenslet-based integral field spectrograph including proposed future instrument concepts for space missions.
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Patrick Ingraham, Patrick Ingraham, Jean-Baptiste Ruffio, Jean-Baptiste Ruffio, Marshall D. Perrin, Marshall D. Perrin, Schuyler G. Wolff, Schuyler G. Wolff, Zachary H. Draper, Zachary H. Draper, Jerome Maire, Jerome Maire, Franck Marchis, Franck Marchis, Vincent Fesquet, Vincent Fesquet, } "Gemini planet imager observational calibrations III: empirical measurement methods and applications of high-resolution microlens PSFs", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91477K (14 July 2014); doi: 10.1117/12.2055283; https://doi.org/10.1117/12.2055283
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