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FLAMINGOS-2: the facility near-infrared wide-field imager and multi-object spectrograph for Gemini

2012; SPIE; Volume: 8446; Linguagem: Inglês

10.1117/12.925679

1996-756X

Stephen S. Eikenberry, Reba M. Bandyopadhyay, John G. Bennett, Aaron Bessoff, Matt Branch, Miguel Charcos, Richard Corley, Curtis DeWitt, John-David Eriksen, R. Elston, Skip Frommeyer, Anthony H. Gonzalez, Kevin Hanna, Michael D. Herlevich, David Hon, Jeff Julian, Roger Julian, N. Lasso, A. Marín-Franch, José R. Martí, Charlie Murphey, S. N. Raines, William Rambold, David Rashkind, C. Warner, Brian Leckie, W. R. Gardhouse, Murray Fletcher, Tim Hardy, Jennifer B. Dunn, Robert Wooff, John Pazder,

Optical Polarization and Ellipsometry

We report on the design, on-sky performance, and status of the FLAMINGOS-2 instrument – the fully-cryogenic facility near-infrared imager and multi-object spectrograph for the Gemini 8-meter telescopes. FLAMINGOS-2 has a refractive all-spherical optical system providing 0.18-arcsecond pixels and a 6.2-arcminute circular field-of-view on a 2048x2048- pixel HAWAII-2 0.9-2.4 μm detector array. A slit/decker wheel mechanism allows the selection of up to 9 multi-object laser-machined plates or 3 long slits for spectroscopy over a 6x2-arcminute field of view, and selectable grisms provide resolutions from ~1300 to ~3000 over the entire spectrograph bandpass. FLAMINGOS-2 is also compatible with the Gemini Multi-Conjugate Adaptive Optics system, providing multi-object spectroscopic capabilities over a 3x1-arcminute field with high spatial resolution (0.09-arcsec/pixel). We review the designs of optical, mechanical, electronics, software, and On-Instrument WaveFront Sensor subsystems. We also present the on-sky performance measured during acceptance testing in 2009, as well as current status of the project and future plans.