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

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

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4847..184r&link_type=abstract

Astronomical Data Analysis II. Edited by Starck, Jean-Luc; Murtagh, Fionn D. Proceedings of the SPIE, Volume 4847, pp. 184-1

Astronomy and Astrophysics

Astronomy

9

Scientific paper

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.

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