RVS Wavelength Calibration: Simulation of Reference Stars

Details RVS Wavelength Calibration: Simulation of Reference Stars RVS Wavelength Calibration: Simulation of Reference Stars

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.576...63c&link_type=abstract

"Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576). Held at the Observatoire de Paris-Me

Physics

Gaia, Radial Velocity Spectrometer, Radial Velocities, Simulated Spectra

Scientific paper

The Radial Velocity Spectrometer (RVS) has no internal wavelength calibration source. It is a self-calibrating instrument relying on many self-selected reference stars. Therefore, only the zero-point of the radial velocities has to be fixed from ground-measured standard stars with accurately known radial velocities. Here we examine the recovery of the wavelength scale as a function of spectral type and magnitude, with a frequently-used software, IRAF. The number of possible reference stars is evaluated from the Tycho-2 Catalogue.

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