The G-CLEF spectrograph optical design

Gábor Fűrész; Harland Epps; Stuart Barnes; William Podgorski; Andrew Szentgyorgyi; Mark Mueller; Daniel Baldwin; Jacob Bean; Henry Bergner; Moo-Young Chun; Jeffrey Crane; Janet Evans; Ian Evans; Jeff Foster; Thomas Gauron; Dani Guzman; Edward Hertz; Andres Jordán; Kang-Min Kim; Kenneth McCracken; Timothy Norton; Mark Ordway; Chan Park; Sang Park; Dave Plummer; Alan Uomoto; In-Soo Yuk

doi:10.1117/12.2057153

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28 July 2014 The G-CLEF spectrograph optical design

Gábor Fűrész, Harland Epps, Stuart Barnes, William Podgorski, Andrew Szentgyorgyi, Mark Mueller, Daniel Baldwin, Jacob Bean, Henry Bergner, Moo-Young Chun, Jeffrey Crane, Janet Evans, Ian Evans, Jeff Foster, Thomas Gauron, Dani Guzman, Edward Hertz, Andres Jordán, Kang-Min Kim, Kenneth McCracken, Timothy Norton, Mark Ordway, Chan Park, Sang Park, Dave Plummer, Alan Uomoto, In-Soo Yuk

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Proceedings Volume 9147, Ground-based and Airborne Instrumentation for Astronomy V; 91479G (2014) https://doi.org/10.1117/12.2057153
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The GMT-Consortium Large Earth Finder (G-CLEF) is a fiber fed, optical echelle spectrograph, which has been selected as a first light instrument for the Giant Magellan Telescope (GMT) currently under construction at the Las Campanas Observatory. We designed G-CLEF as a general-purpose echelle spectrograph with a precision radial velocity (PRV) capability goal of 0.1 m/s, which will enable it to detect/measure the mass of an Earth-sized planet orbiting a Solar-type star in its habitable zone. This goal imposes challenging requirements on all aspects of the instrument and some of those are best incorporated directly into the optical design process. In this paper we describe the preliminary optical design of the G-CLEF instrument and briefly describe some novel solutions we have introduced into the asymmetric white pupil echelle configuration.

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Gábor Fűrész, Harland Epps, Stuart Barnes, William Podgorski, Andrew Szentgyorgyi, Mark Mueller, Daniel Baldwin, Jacob Bean, Henry Bergner, Moo-Young Chun, Jeffrey Crane, Janet Evans, Ian Evans, Jeff Foster, Thomas Gauron, Dani Guzman, Edward Hertz, Andres Jordán, Kang-Min Kim, Kenneth McCracken, Timothy Norton, Mark Ordway, Chan Park, Sang Park, Dave Plummer, Alan Uomoto, and In-Soo Yuk "The G-CLEF spectrograph optical design", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91479G (28 July 2014); https://doi.org/10.1117/12.2057153

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