Share Email Print

Proceedings Paper

Data-reduction software for GIRAFFE, the VLT medium-resolution multi-object fiber-fed spectrograph
Author(s): Andre Blecha; Veronique Cayatte; Pierre North; Frederic Royer; Gilles Simond
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

A brief overview is given of the data-reduction software (DRS) being developed at Geneva and Paris Observatories for the fiber-fed multi-object GIRAFFE spectrograph - part of the VLT FLAMES facility. The specific aspects of each of three modes is presented and discussed. The localization and the extraction are described in more details, the original features are outlined and the critical issue addressed. We discuss the problem of the PSF variation across the surface of the detector and the impact on the sky subtraction. The strategy of the real-time data quality assessment using the simultaneous calibration exposure is described. Some aspect of the DRS implementation and the VLT environment are discussed. The dirty prototype of the DRS under Matlab including the crude instrument simulator is discussed and some experiments measuring the expected accuracy of radial- velocity are shown.

Paper Details

Date Published: 16 August 2000
PDF: 8 pages
Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000); doi: 10.1117/12.395507
Show Author Affiliations
Andre Blecha, Observatoire de Geneve (Switzerland)
Veronique Cayatte, Observatoire de Paris-Meudon (France)
Pierre North, Institut d'Astronomie de l'Univ. de Lausanne (Switzerland)
Frederic Royer, Observatoire de Geneve (Switzerland)
Gilles Simond, Observatoire de Geneve (Switzerland)

Published in SPIE Proceedings Vol. 4008:
Optical and IR Telescope Instrumentation and Detectors
Masanori Iye; Alan F. M. Moorwood, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?