2005/02/23 by Jeffrey D. Crane, Steven R. Majewski, Richard J. Patterson +4
Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy and Astrophysical Research #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/429683
Accepted for publication in the May 2005 issue of the PASP
arxiv created 2005/02/23 · openalex publication_date 2005/05/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
The Fan Observatory Bench Optical Spectrograph (FOBOS) is intended for single‐object optical spectroscopy at moderate resolution (R∼1500–3000) using a fiber‐fed, bench‐mounted design to maintain stability. Whenever possible, the instrument uses off‐the‐shelf components to maintain a modest cost. FOBOS supports Galactic astronomy projects that require consistently well‐measured (∼5 km s −1 ) radial velocities for large numbers of broadly distributed and relatively bright (V≲14) stars. The spectrograph provides wavelength coverage throughout the optical spectrum, although the instrument design was optimized for use in the range 4700 Å<λ<6700 Å. Test data indicate that the instrument is stable and capable of measuring radial velocities with precision better than 3 km s −1 at a resolution of R∼1500 with minimal calibration overhead.