The Carnegie Planet Finder Spectrograph: a status report

Jeffrey D. Crane; Stephen A. Shectman; R. Paul Butler; Ian B. Thompson; Gregory S. Burley

doi:10.1117/12.789637

9 July 2008 The Carnegie Planet Finder Spectrograph: a status report

Jeffrey D. Crane, Stephen A. Shectman, R. Paul Butler, Ian B. Thompson, Gregory S. Burley

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 701479 (2008) https://doi.org/10.1117/12.789637
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

The Carnegie Planet Finder Spectrograph (PFS) has been constructed for use with the Magellan telescopes at Las Campanas Observatory in Chile. PFS has been optimized for high-precision measurement of stellar radial velocities in order to support an ongoing search for extrasolar planets. PFS uses an R4 echelle grating and a prism cross-disperser in a Littrow arrangement to provide complete wavelength coverage between 390 and 620 nm distributed across 58 orders. Spectral resolution is 38,000 when using a 1 arcsec slit. An iodine absorption cell is included in the pre-slit module to allow the superimposition of well-defined absorption features on the stellar spectra. To improve velocity stability, the echelle grating is enclosed in a small vacuum tank with the cross-dispersing prism acting as the vacuum window. The spectrograph is mounted on an invar optical bench that is surrounded by an insulated enclosure with circulating liquid temperature control. Fabrication and assembly have been completed, and testing will soon be underway. Delivery to Las Campanas Observatory is scheduled for late 2008.

Citation Download Citation

Jeffrey D. Crane, Stephen A. Shectman, R. Paul Butler, Ian B. Thompson, and Gregory S. Burley "The Carnegie Planet Finder Spectrograph: a status report", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 701479 (9 July 2008); https://doi.org/10.1117/12.789637

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