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Proceedings Paper

The physical model in action: quality control for X-Shooter
Author(s): Sabine Moehler; Paul Bristow; Florian Kerber; Andrea Modigliani; Joel Vernet
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Paper Abstract

The data reduction pipeline for the VLT 2nd generation instrument X-Shooter uses a physical model to determine the optical distortion and derive the wavelength calibration. The parameters of this model describe the positions, orientations, and other physical properties of the optical components in the spectrograph. They are updated by an optimisation process that ensures the best possible fit to arc lamp line positions. ESO Quality Control monitors these parameters along with all of the usual diagnostics. This enables us to look for correlations between inferred physical changes in the instrument and, for example, instrument temperature sensor readings.

Paper Details

Date Published: 29 July 2010
PDF: 9 pages
Proc. SPIE 7737, Observatory Operations: Strategies, Processes, and Systems III, 77371G (29 July 2010); doi: 10.1117/12.856427
Show Author Affiliations
Sabine Moehler, European Southern Observatory (Germany)
Paul Bristow, European Southern Observatory (Germany)
Florian Kerber, European Southern Observatory (Germany)
Andrea Modigliani, European Southern Observatory (Germany)
Joel Vernet, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 7737:
Observatory Operations: Strategies, Processes, and Systems III
David R. Silva; Alison B. Peck; B. Thomas Soifer, Editor(s)

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