Characteristics
The electromagnetic spectrum wavelength range is 389.5 nm to 681.5 nm in a single exposure, split into 67 spectral orders. The instrument, which was located in a temperature-controlled room, was fed with optical fibers from the Cassegrain focus. One of the unique features of ELODIE was an integrated data reduction pipeline which fully reduces the spectra immediately after acquisition and allows the user to measure highly accurate radial velocities through cross-correlation with a numerical mask. This accuracy can reach ±7 m/s.
Over 34,000 spectra have been taken with this instrument so far, over 20,000 of which are publicly available through a dedicated on-line archive. ELODIE was the result of a collaboration between the observatories of Haute-Provence, Geneva and Marseille. A publication describing the instrument appeared in Astronomy & Astrophysics Supplements.
Read more about this topic: ELODIE Spectrograph