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Proceedings Paper

Detector monitoring as part of VLT science and data flow operations
Author(s): Wolfgang Hummel; Lander de Bilbao; Andrea Modigliani; Lars Lundin; Paola Amico; Pascal Ballester; Gaspare LoCurto; Leonardo Vanzi
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Paper Abstract

The ESO Paranal observatory is operating a heterogeneous set of science detectors. The maintenance and quality control of science detectors is an important routine task to retain the technical and science performance of the instrumentation. In 2006 a detector monitoring working group was built devoted with the following tasks: inventory of the currently existing detector calibration plans and monitored quality characteristics, completion and homogenization of the detector calibrations plans, design and implementation of cross-instrument applicable templates and data reduction pipeline recipes and monitoring tools. The instrument calibration plans include monthly and daily scheduled detector calibrations. The monthly calibrations are to measure linearity, contamination and gain including the inter-pixel capacitance correction factor. A reference recipe has been defined to be applicable to all operational VLT instruments and has been tested on archive calibration frames for optical, near- and mid-infrared science detectors. The daily calibrations measure BIAS or DARK level and read-out noise in different ways. This has until now prevented cross detector comparison of performance values. The upgrade of the daily detector calibration plan consists of the homogenization of the measurement method in the existing pipeline recipes.

Paper Details

Date Published: 12 July 2008
PDF: 11 pages
Proc. SPIE 7016, Observatory Operations: Strategies, Processes, and Systems II, 70160R (12 July 2008); doi: 10.1117/12.788662
Show Author Affiliations
Wolfgang Hummel, European Southern Observatory (Germany)
Lander de Bilbao, European Southern Observatory (Germany)
Fundación Española para la Ciencia y la Tecnología (Spain)
Instituto de Física de Cantabria (Spain)
Andrea Modigliani, European Southern Observatory (Germany)
Lars Lundin, European Southern Observatory (Germany)
Paola Amico, European Southern Observatory (Chile)
Pascal Ballester, European Southern Observatory (Germany)
Gaspare LoCurto, European Southern Observatory (Chile)
Leonardo Vanzi, European Southern Observatory (Chile)
Pontificia Univ. Catolica de Chile (Chile)


Published in SPIE Proceedings Vol. 7016:
Observatory Operations: Strategies, Processes, and Systems II
Roger J. Brissenden; David R. Silva, Editor(s)

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