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Proceedings Paper

The Carnegie Planet Finder Spectrograph
Author(s): Jeffrey D. Crane; Stephen A. Shectman; R. Paul Butler
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Paper Abstract

The Carnegie Planet Finder Spectrograph is being constructed for use at the Magellan Telescopes at Las Campanas Observatory in Chile. Its primary scientific objective is the detection of extrasolar planets through monitoring of stellar radial velocity variations. The spectrograph is being optimized for high precision measurement of these velocities with a resolution goal of 1 m s-1. The optical design includes all spherical, standard optical glass and calcium fluoride lenses that function as both camera and collimator in a double-pass configuration. A prism cross-disperser is also used in double-pass and provides a minimum order separation of 4.0 arcsec. An R4 echelle grating is illuminated near true Littrow and provides complete wavelength coverage between 390 nm and 620 nm. Spectral resolution is 38,000 when using a 1 arcsec slit, although slit widths as small as 0.2 arcsec are available. An iodine cell is used to superimpose well-defined absorption features onto spectra to serve as a fiducial wavelength scale, and a thorium argon lamp is available for traditional wavelength calibrations. The spectrograph is currently under construction and is scheduled for commissioning in the second quarter of 2007.

Paper Details

Date Published: 30 June 2006
PDF: 11 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 626931 (30 June 2006); doi: 10.1117/12.672339
Show Author Affiliations
Jeffrey D. Crane, Observatories of the Carnegie Institution of Washington (United States)
Stephen A. Shectman, Observatories of the Carnegie Institution of Washington (United States)
R. Paul Butler, Carnegie Institution of Washington (United States)


Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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