Advanced Fiber-Optic Echelle spectrometer
Advanced Fiber-Optic Echelle Spectrometer (AFOE) is a high-resolution spectrograph used with the 1.5-meter (60-inch) telescope of the Whipple Observatory to perform precise radial velocity measurements of stars.1 An extrasolar planet detection program based on the AFOE has been in operation since 1995. It resulted in the detection of a planet around rho Corona Borealis and a planetary system around upsilon Andromedae, and the confirmation of planets around tau Bootis and 51 Pegasi.
1. Brown, T. M., Noyes, R. W., Nisenson, P., Korzennik, S. G., and Horner, S. "The AFOE: A Spectrograph for Precise Doppler Studies," Publications of the Astronomical Society of the Pacific, 106, 1285 (1994).