24 September 2012 A passive cost-effective solution for the high accuracy wavelength calibration of radial velocity spectrographs
Author Affiliations +
Abstract
Today, the RV technique has pushed the planet detection limits down to super-earths but the reach the precision required to detect earth-like planets it is necessary to reach a precision around 1cm s-1. While a significant part of the error budget is the incompressible photon noise, another part is the noise in the wavelength calibration of the spectrograph. In the past 3 years the Observatory of Geneva has designed, built and tested an commissioned 2 wavelength calibrator systems based on a Fabry-Perot (FP) interferometer with great success. The calibrator system demonstrated 10 cm s-1 stability over one night and 1 m s-1 over 60 days. By improving the system injecting the calibration light into the calibration fiber of the spectrograph we are aiming at 1 m s-1 repeatability over the long term. This technique is now being extended to cover the near infrared to the K band in the frame of the SPIROU project.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Françcis Wildi, Françcis Wildi, Bruno Chazelas, Bruno Chazelas, Francesco Pepe, Francesco Pepe, } "A passive cost-effective solution for the high accuracy wavelength calibration of radial velocity spectrographs", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84468E (24 September 2012); doi: 10.1117/12.926841; https://doi.org/10.1117/12.926841
PROCEEDINGS
8 PAGES


SHARE
Back to Top