APF-The Lick Observatory Automated Planet Finder
NAVAL OBSERVATORY WASHINGTON DC
Pagination or Media Count:
The Automated Planet Finder APF is a facility purpose-built for the discovery and characterization of extrasolar planets through high-cadence Doppler velocimetry of the reflex barycentric accelerations of their host stars. Located atop Mount Hamilton, the APF facility consists of a 2.4 m telescope and its Levy spectrometer, an optical echelle spectrometer optimized for precision Doppler velocimetry. APF features a fixed-format spectral range from 374 970 nm, and delivers a throughput resolution slit width product of 114,000 , with spectral resolutions up to 150,000. Overall system efficiency fraction of photons incident on the primary mirror that are detected by the science CCD on blaze at 560 nm in planet-hunting mode is 15. First-light tests on the radialvelocity RV standard stars HD 185144 and HD 9407 demonstrate sub-meter-per-second precision rms per observation held over a 3 month period. This paper reviews the basic features of the telescope, dome, and spectrometer, and gives a brief summary of first-light performance.
- Navigation and Guidance