The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF): a general purpose optical echelle spectrograph for the GMT with precision radial velocity capability
The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF) is a fiber fed, optical echelle spectrograph that has undergone conceptual design for consideration as a first light instrument at the Giant Magellan Telescope. GCLEF has been designed to be a general-purpose echelle spectrograph w...
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Society of Photo-Optical Instrumentation Engineers (SPIE)
2019
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| Online Access: | https://hdl.handle.net/1721.1/121180 |
| _version_ | 1826215221152186368 |
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| author | Szentgyorgyi, A. Frebel, Anna L. Furesz, G. Hertz, E. Norton, T. Bean, J. Bergner, H. Crane, J. Evans, J. Evans, I. Gauron, T. Jordán, A. Park, S. Uomoto, A. Barnes, S. Davis, W. Eisenhower, M. Epps, H. Guzman, D. McCracken, K. Ordway, M. Plummer, D. Podgorski, W. Weaver, D. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Szentgyorgyi, A. Frebel, Anna L. Furesz, G. Hertz, E. Norton, T. Bean, J. Bergner, H. Crane, J. Evans, J. Evans, I. Gauron, T. Jordán, A. Park, S. Uomoto, A. Barnes, S. Davis, W. Eisenhower, M. Epps, H. Guzman, D. McCracken, K. Ordway, M. Plummer, D. Podgorski, W. Weaver, D. |
| author_sort | Szentgyorgyi, A. |
| collection | MIT |
| description | The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF) is a fiber fed, optical echelle spectrograph that has undergone conceptual design for consideration as a first light instrument at the Giant Magellan Telescope. GCLEF has been designed to be a general-purpose echelle spectrograph with precision radial velocity (PRV) capability. We have defined the performance envelope of G-CLEF to address several of the highest science priorities in the Decadal Survey1. The spectrograph optical design is an asymmetric, two-arm, white pupil design. The asymmetric white pupil design is adopted to minimize the size of the refractive camera lenses. The spectrograph beam is nominally 300 mm, reduced to 200 mm after dispersion by the R4 echelle grating. The peak efficiency of the spectrograph is >35% and the passband is 3500-9500Å. The spectrograph is primarily fed with three sets of fibers to enable three observing modes: High-Throughput, Precision-Abundance and PRV. The respective resolving powers of these modes are R~ 25,000, 40,000 and 120,000. We also anticipate having an R~40,000 Multi-object Spectroscopy mode with a multiplex of ~40 fibers. In PRV mode, each of the seven 8.4m GMT primary mirror sub-apertures feeds an individual fiber, which is scrambled after pupil-slicing. The goal radial velocity precision of G-CLEF is ∂V <10 cm/sec radial. In this paper, we provide a flowdown from fiducial science programs to design parameters. We discuss the optomechanical, electrical, structural and thermal design and present a roadmap to first light at the GMT. |
| first_indexed | 2024-09-23T16:19:20Z |
| format | Article |
| id | mit-1721.1/121180 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:19:20Z |
| publishDate | 2019 |
| publisher | Society of Photo-Optical Instrumentation Engineers (SPIE) |
| record_format | dspace |
| spelling | mit-1721.1/1211802022-09-29T19:32:53Z The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF): a general purpose optical echelle spectrograph for the GMT with precision radial velocity capability Szentgyorgyi, A. Frebel, Anna L. Furesz, G. Hertz, E. Norton, T. Bean, J. Bergner, H. Crane, J. Evans, J. Evans, I. Gauron, T. Jordán, A. Park, S. Uomoto, A. Barnes, S. Davis, W. Eisenhower, M. Epps, H. Guzman, D. McCracken, K. Ordway, M. Plummer, D. Podgorski, W. Weaver, D. Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF) is a fiber fed, optical echelle spectrograph that has undergone conceptual design for consideration as a first light instrument at the Giant Magellan Telescope. GCLEF has been designed to be a general-purpose echelle spectrograph with precision radial velocity (PRV) capability. We have defined the performance envelope of G-CLEF to address several of the highest science priorities in the Decadal Survey1. The spectrograph optical design is an asymmetric, two-arm, white pupil design. The asymmetric white pupil design is adopted to minimize the size of the refractive camera lenses. The spectrograph beam is nominally 300 mm, reduced to 200 mm after dispersion by the R4 echelle grating. The peak efficiency of the spectrograph is >35% and the passband is 3500-9500Å. The spectrograph is primarily fed with three sets of fibers to enable three observing modes: High-Throughput, Precision-Abundance and PRV. The respective resolving powers of these modes are R~ 25,000, 40,000 and 120,000. We also anticipate having an R~40,000 Multi-object Spectroscopy mode with a multiplex of ~40 fibers. In PRV mode, each of the seven 8.4m GMT primary mirror sub-apertures feeds an individual fiber, which is scrambled after pupil-slicing. The goal radial velocity precision of G-CLEF is ∂V <10 cm/sec radial. In this paper, we provide a flowdown from fiducial science programs to design parameters. We discuss the optomechanical, electrical, structural and thermal design and present a roadmap to first light at the GMT. 2019-05-30T15:42:30Z 2019-05-30T15:42:30Z 2012-10 2019-03-22T12:24:29Z Article http://purl.org/eprint/type/ConferencePaper 0277-786X https://hdl.handle.net/1721.1/121180 Szentgyorgyi, A., A. Frebel, G. Furesz, E. Hertz, T. Norton, J. Bean, H. Bergner, et al. “The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF): a General Purpose Optical Echelle Spectrograph for the GMT with Precision Radial Velocity Capability.” Edited by Ian S. McLean, Suzanne K. Ramsay, and Hideki Takami. Ground-Based and Airborne Instrumentation for Astronomy IV, July 2012, Amsterdam, Netherlands, SPIE,October 2012 © SPIE http://dx.doi.org/10.1117/12.924957 Ground-based and Airborne Instrumentation for Astronomy IV Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Society of Photo-Optical Instrumentation Engineers (SPIE) SPIE |
| spellingShingle | Szentgyorgyi, A. Frebel, Anna L. Furesz, G. Hertz, E. Norton, T. Bean, J. Bergner, H. Crane, J. Evans, J. Evans, I. Gauron, T. Jordán, A. Park, S. Uomoto, A. Barnes, S. Davis, W. Eisenhower, M. Epps, H. Guzman, D. McCracken, K. Ordway, M. Plummer, D. Podgorski, W. Weaver, D. The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF): a general purpose optical echelle spectrograph for the GMT with precision radial velocity capability |
| title | The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF): a general purpose optical echelle spectrograph for the GMT with precision radial velocity capability |
| title_full | The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF): a general purpose optical echelle spectrograph for the GMT with precision radial velocity capability |
| title_fullStr | The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF): a general purpose optical echelle spectrograph for the GMT with precision radial velocity capability |
| title_full_unstemmed | The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF): a general purpose optical echelle spectrograph for the GMT with precision radial velocity capability |
| title_short | The GMT-CfA, Carnegie, Catolica, Chicago Large Earth Finder (G-CLEF): a general purpose optical echelle spectrograph for the GMT with precision radial velocity capability |
| title_sort | gmt cfa carnegie catolica chicago large earth finder g clef a general purpose optical echelle spectrograph for the gmt with precision radial velocity capability |
| url | https://hdl.handle.net/1721.1/121180 |
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