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29 July 2010 The physical model in action: quality control for X-Shooter
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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.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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