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Proceedings Paper

Toward accurate radial velocities with the fiber-fed GIRAFFE multi-object VLT spectrograph
Author(s): Frederic Royer; Andre Blecha; Pierre North; Gilles Simond; Sebastien Baratchart; Veronique Cayatte; Laurent Chemin; Ralf Palsa
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Paper Abstract

We describe briefly the Data-Reduction of the VLT fiber-fed multi-object GIRAFFE spectrograph - part of the VLT FLAMES facility. We focus on specific features of GIRAFFE - the simultaneous wavelength calibration - and their impact on the data-reduction strategy. We describe the implementation of the global physical model and we compare the results obtained with the simulated, laboratory and preliminary data. We discuss the influence of critical parameters, the overall accuracy of the wavelength solution, and the stability and the robustness of the global model approach. We address the accuracy of radial velocity measurements illustrated by solar spectra obtained during the Preliminary Acceptance in Europe.

Paper Details

Date Published: 19 December 2002
PDF: 11 pages
Proc. SPIE 4847, Astronomical Data Analysis II, (19 December 2002); doi: 10.1117/12.460552
Show Author Affiliations
Frederic Royer, Observatoire de Geneva and Observatoire de Paris-Meudon (Switzerland)
Andre Blecha, Observatoire de Geneve (Switzerland)
Pierre North, Institut d'Astronomie/Univ. de Lausanne (Switzerland)
Gilles Simond, Observatoirede Geneve (Switzerland)
Sebastien Baratchart, Observatoire de Paris-Meudon (United States)
Veronique Cayatte, Observatoire de Paris-Meudon (United States)
Laurent Chemin, Observatoire de Paris-Meudon (United States)
Ralf Palsa, European Southern Observatory (United States)

Published in SPIE Proceedings Vol. 4847:
Astronomical Data Analysis II
Jean-Luc Starck; Fionn D. Murtagh, Editor(s)

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