Toward accurate radial velocities with the fiber-fed GIRAFFE multi-object VLT spectrograph

Frederic Royer; Andre Blecha; Pierre North; Gilles Simond; Sebastien Baratchart; Veronique Cayatte; Laurent Chemin; Ralf Palsa

doi:10.1117/12.460552

19 December 2002 Toward accurate radial velocities with the fiber-fed GIRAFFE multi-object VLT spectrograph

Frederic Royer, Andre Blecha, Pierre North, Gilles Simond, Sebastien Baratchart, Veronique Cayatte, Laurent Chemin, Ralf Palsa

Author Affiliations +

Proceedings Volume 4847, Astronomical Data Analysis II; (2002) https://doi.org/10.1117/12.460552
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

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.

Citation Download Citation

Frederic Royer, Andre Blecha, Pierre North, Gilles Simond, Sebastien Baratchart, Veronique Cayatte, Laurent Chemin, and Ralf Palsa "Toward accurate radial velocities with the fiber-fed GIRAFFE multi-object VLT spectrograph", Proc. SPIE 4847, Astronomical Data Analysis II, (19 December 2002); https://doi.org/10.1117/12.460552

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