The physical model in action: quality control for X-Shooter

Sabine Moehler; Paul Bristow; Florian Kerber; Andrea Modigliani; Joel Vernet

doi:10.1117/12.856427

29 July 2010 The physical model in action: quality control for X-Shooter

Sabine Moehler, Paul Bristow, Florian Kerber, Andrea Modigliani, Joel Vernet

Proceedings Volume 7737, Observatory Operations: Strategies, Processes, and Systems III; 77371G (2010) https://doi.org/10.1117/12.856427
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

The data reduction pipeline for the VLT 2^nd 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.

Citation Download Citation

Sabine Moehler, Paul Bristow, Florian Kerber, Andrea Modigliani, and Joel Vernet "The physical model in action: quality control for X-Shooter", Proc. SPIE 7737, Observatory Operations: Strategies, Processes, and Systems III, 77371G (29 July 2010); https://doi.org/10.1117/12.856427

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