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Proceedings Paper

Results from upgrades to the radial velocity instrument, ET, at the KPNO 2.1 m
Author(s): Julian C. van Eyken; Jian Ge; Suvrath Mahadevan; Curtis DeWitt; Jerry Friedman; Padraic Finnerty; Deqing Ren; Mike Zugger
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Paper Abstract

A radial velocity (RV) survey instrument, Exoplanet Tracker (ET), has been commissioned at the Kitt Peak 2.1m telescope. It is a fiber-fed, fixed-delay Michelson interferometer followed by a medium resolution volume phase holographic spectrograph (operating at ~5000) for the visual band, and is planned to be opened to the public for RV related research in 2005. Since 2002 the measured total throughput of ET from above the atmosphere to the detector has been improved to about 18% (or 50% for the instrument itself from the fiber input to the detector), ~5 times higher than the current cross-dispersed echelle spectrometers for Doppler planet searches. We present new preliminary results from our improved version of ET, with 600 Angstrom wavelength coverage, showing RV measurements for HD 130322 (V=8.05), a known planet-bearing star, using 15 min exposures. A best short-term Doppler precision of 2.9 m/s has been achieved with this new instrument. We will start a pilot planet search of around 500 V=8--9 mag. stars with the 2.1m telescope in the Spring of 2005, and a multiple object RV feasibility study will also be conducted at the Sloan 2.5m wide field telescope in Spring 2005.

Paper Details

Date Published: 30 September 2004
PDF: 7 pages
Proc. SPIE 5492, Ground-based Instrumentation for Astronomy, (30 September 2004); doi: 10.1117/12.551889
Show Author Affiliations
Julian C. van Eyken, The Pennsylvania State Univ. (United States)
Jian Ge, The Pennsylvania State Univ. (United States)
Suvrath Mahadevan, The Pennsylvania State Univ. (United States)
Curtis DeWitt, The Pennsylvania State Univ. (United States)
Jerry Friedman, The Pennsylvania State Univ. (United States)
Padraic Finnerty, The Pennsylvania State Univ. (United States)
Deqing Ren, The Pennsylvania State Univ. (United States)
Mike Zugger, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 5492:
Ground-based Instrumentation for Astronomy
Alan F. M. Moorwood; Masanori Iye, Editor(s)

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