20 July 2010 A Fabry-Perot calibrator of the HARPS radial velocity spectrograph: performance report
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Abstract
The radial velocity (RV) technique has pushed the planet detection limits down to super-earths. To reach the precision required to detect earth-like planets it is necessary to reach a precision around 1cm.s-1. Part of the error budget is due to noise in the wavelength calibration of the spectrograph. The Observatory of Geneva has designed, built and tested in collaboration with ESO a calibrator system based on a Fabry-Perot interferometer to explore its potential to improve the wavelength calibration of RV spectrographs. We have obtained exciting results with the calibrator system demonstrated 10 cm s-1 stability over one night. By further improving the injection system we are aiming at a 1 m s-1 repeatability over the long term.
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François Wildi, Francesco Pepe, Bruno Chazelas, Gaspare Lo Curto, Ch. Lovis, "A Fabry-Perot calibrator of the HARPS radial velocity spectrograph: performance report", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77354X (20 July 2010); doi: 10.1117/12.857951; https://doi.org/10.1117/12.857951
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