Echelle++ generates realistic spectra of astronomical and calibration sources, with accurate representation of optical aberrations, the shape of the point-spread function, detector characteristics, and photon noise. As a part of this process, we have developed a analytical toolset to assess the predicted performance of G-CLEF as it has evolved through design phases.We present the software package, Echelle++, an open-source C++ code to simulate realistic raw spectra based on the Zemax model of any spectrograph, with a particular emphasis on cross-dispersed Échelle spectrographs. G-CLEF has been conceived and designed within a strict systems engineering framework. The control system software is being developed in model-driven software context that has been adopted globally by the GMT. The spectrograph camera subsystem is divided into a red and a blue channel, split by a dichroic, so there are two independent refractive spectrograph cameras.
G-CLEF will be the first PRV spectrograph to have a composite optical bench so as to exploit that material's extremely low coefficient of thermal expansion, high in-plane thermal conductivity and high stiffness-to-mass ratio. We give an overview of the innovative features of the current design. The design of G-CLEF incorporates several novel technical innovations. This passband provides good sensitivity at blue wavelengths for stellar abundance studies and deep red response for observations of high-redshift phenomena. The passband of G-CLEF is broad, extending from 3500 angstrom to. G-CLEF is vacuumenclosed and fiber-fed to enable precision radial velocity (PRV) measurements, especially for the detection and characterization of low-mass exoplanets orbiting solar-type stars. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990822 (August 9, 2016) doi:10.1117/12.2233506 Ībstract The GMT-Consortium Large Earth Finder (G-CLEF) will be a cross-dispersed, optical band echelle spectrograph to be delivered as the first light scientific instrument for the Giant Magellan Telescope (GMT) in 2022. Crane Harland Epps Ian Evans Janet Evans Jeff Foster Anna Frebel Thomas Gauron Dani Guzmán Tyson Hare Bi-Ho Jang Jeong-Gyun Jang Andres Jordan Jihun Kim Kang-Miin Kim Claudia Mendes Mendes de Oliveira Mercedes Lopez-Morales Kenneth McCracken Stuart McMuldroch Joseph Miller Mark Mueller Jae Sok Oh Cem Onyuksel Mark Ordway Byeong-Gon Park Chan Park Sung-Joon Park Charles Paxson David Phillips David Plummer William Podgorski Andreas Seifahrt Daniel Stark Joao Steiner Alan Uomoto Ronald Walsworth and Young-Sam Yu " The GMT-Consortium Large Earth Finder (G-CLEF): an optical Echelle spectrograph for the Giant Magellan Telescope (GMT) ", Proc.
Citation Andrew Szentgyorgyi Daniel Baldwin Stuart Barnes Jacob Bean Sagi Ben-Ami Patricia Brennan Jamie Budynkiewicz Moo-Young Chun Charlie Conroy Jeffrey D.
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