8 March 2017 The Gemini High-Resolution Optical SpecTrograph (GHOST)
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Abstract
The Gemini High-Resolution Optical SpecTrograph (GHOST) is the newest instrument chosen for the Gemini South telescope. It is being developed by a collaboration between the Australian Astronomical Observatory (AAO), the NRC - Herzberg in Canada and the Australian National University (ANU). Using recent technological advances and several novel concepts it will deliver spectroscopy with R>50,000 for up to 2 objects simultaneously or R>75,000 for a single object. GHOST uses a fiber-image-slicer to allow use of a much smaller spectrograph than that nominally required by the resolution-slit–width product. With its fiber feed, we expect GHOST to have a sensitivity in the wavelength range between 363-950 nm that equals or exceeds that of similar directly-fed instruments on world-class facilities. GHOST has entered the build phase. We report the status of the instrument and describe the technical advances and the novel aspects, such as the lenslet-based slit reformatting. Finally, we describe the unique scientific role this instrument will have in an international context, from exoplanets through stellar elemental abundances to the distant Universe. Keywords: Gemini, spectrograph, spectroscopy, ́echelle, high resolution, radial velocity, fiber image slicer, integral field unit.
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Andrew I. Sheinis, Andrew I. Sheinis, Andre Anthony, Andre Anthony, Gabriella Baker, Gabriella Baker, Gregory S. Burley, Gregory S. Burley, Vladimir Churilov, Vladimir Churilov, Michael Edgar, Michael Edgar, Michael Ireland, Michael Ireland, Yuriy Kondrat, Yuriy Kondrat, John Pazder, John Pazder, Gordon Robertson, Gordon Robertson, Peter J. Young, Peter J. Young, Ross Zhelem, Ross Zhelem, } "The Gemini High-Resolution Optical SpecTrograph (GHOST)", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990817 (8 March 2017); doi: 10.1117/12.2232231; https://doi.org/10.1117/12.2232231
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