A Fabry-Perot calibrator of the HARPS radial velocity spectrograph: performance report

François Wildi; Francesco Pepe; Bruno Chazelas; Gaspare Lo Curto; Ch. Lovis

doi:10.1117/12.857951

20 July 2010 A Fabry-Perot calibrator of the HARPS radial velocity spectrograph: performance report

François Wildi, Francesco Pepe, Bruno Chazelas, Gaspare Lo Curto, Ch. Lovis

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 77354X (2010) https://doi.org/10.1117/12.857951
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

François Wildi, Francesco Pepe, Bruno Chazelas, Gaspare Lo Curto, and 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); https://doi.org/10.1117/12.857951

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