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

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

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7735e.164w&link_type=abstract

Ground-based and Airborne Instrumentation for Astronomy III. Edited by McLean, Ian S.; Ramsay, Suzanne K.; Takami, Hideki. Pro

Astronomy and Astrophysics

Astronomy

1

Scientific paper

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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