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Proceedings Article

A passive cost-effective solution for the high accuracy wavelength calibration of radial velocity spectrographs

[+] Author Affiliations
Françcis Wildi, Bruno Chazelas, Francesco Pepe

Observatoire de l'Univ. de Genève (Switzerland)

Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84468E (September 24, 2012); doi:10.1117/12.926841
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From Conference Volume 8446

  • Ground-based and Airborne Instrumentation for Astronomy IV
  • Ian S. McLean; Suzanne K. Ramsay; Hideki Takami
  • Amsterdam, Netherlands | July 01, 2012

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.
Citation

Françcis Wildi ; Bruno Chazelas and 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 (September 24, 2012); doi:10.1117/12.926841; http://dx.doi.org/10.1117/12.926841


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