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Proceedings Paper

iLocater: a diffraction-limited Doppler spectrometer for the Large Binocular Telescope
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Paper Abstract

We are developing a stable and precise spectrograph for the Large Binocular Telescope (LBT) named “iLocater.” The instrument comprises three principal components: a cross-dispersed echelle spectrograph that operates in the YJ-bands (0.97-1.30 μm), a fiber-injection acquisition camera system, and a wavelength calibration unit. iLocater will deliver high spectral resolution (R~150,000-240,000) measurements that permit novel studies of stellar and substellar objects in the solar neighborhood including extrasolar planets. Unlike previous planet-finding instruments, which are seeing-limited, iLocater operates at the diffraction limit and uses single mode fibers to eliminate the effects of modal noise entirely. By receiving starlight from two 8.4m diameter telescopes that each use “extreme” adaptive optics (AO), iLocater shows promise to overcome the limitations that prevent existing instruments from generating sub-meter-per-second radial velocity (RV) precision. Although optimized for the characterization of low-mass planets using the Doppler technique, iLocater will also advance areas of research that involve crowded fields, line-blanketing, and weak absorption lines.

Paper Details

Date Published: 4 August 2016
PDF: 13 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990819 (4 August 2016); doi: 10.1117/12.2233135
Show Author Affiliations
Justin R. Crepp, Univ. of Notre Dame (United States)
Jonathan Crass, Univ. of Notre Dame (United States)
David King, Univ. of Cambridge (United States)
Andrew Bechter, Univ. of Notre Dame (United States)
Eric Bechter, Univ. of Notre Dame (United States)
Ryan Ketterer, Univ. of Notre Dame (United States)
Robert Reynolds, Large Binocular Telescope Observatory (United States)
Philip Hinz, Steward Observatory, The Univ. of Arizona (United States)
Derek Kopon, Harvard-Smithsonian Ctr. for Astrophysics (United States)
David Cavalieri, Univ. of Notre Dame (United States)
Louis Fantano, NASA Goddard Space Flight Ctr. (United States)
Corina Koca, NASA Goddard Space Flight Ctr. (United States)
Eleanya Onuma, NASA Goddard Space Flight Ctr. (United States)
Karl Stapelfeldt, NASA Goddard Space Flight Ctr. (United States)
The Ohio State Univ. (United States)
Joseph Thomes, NASA Goddard Space Flight Ctr. (United States)
Sheila Wall, NASA Goddard Space Flight Ctr. (United States)
Steven Macenka, Jet Propulsion Lab. (United States)
James McGuire, Jet Propulsion Lab. (United States)
Ronald Korniski, Jet Propulsion Lab. (United States)
Leonard Zugby, Jet Propulsion Lab. (United States)
Joshua Eisner, The Univ. of Arizona (United States)
B Scott Gaudi, The Ohio State Univ. (United States)
Fred Hearty, The Pennsylvania State Univ. (United States)
Kaitlin Kratter, Steward Observatory, The Univ. of Arizona (United States)
Marc Kuchner, NASA Goddard Space Flight Ctr. (United States)
Giusi Micela, INAF - Osservatorio Astronomico di Palermo (Italy)
Matthew Nelson, Univ. of Virginia (United States)
Isabella Pagano, INAF - Osservatorio Astrofisico di Catania (Italy)
Andreas Quirrenbach, Landessternwarte Heidelberg (Germany)
Christian Schwab, Macquarie Univ. (Australia)
Michael Skrutskie, Univ. of Virginia (United States)
Alessandro Sozzetti, INAF - Osservatorio Astrofisico di Torino (United States)
Charles Woodward, Univ. of Minnesota (United States)
Bo Zhao, Univ. of Florida (United States)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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