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Proceedings Paper

Calibration of VISIR: the VLT mid-infrared imager/spectrometer
Author(s): Arnaud J. Claret; Pierre-Olivier Lagage; Eric Pantin; Didier Dubreuil; Philippe Galdemard; Anton Schoenmaker; Jan-Willem Pel
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Paper Abstract

Since the beginning of the VISIR project, the calibration aspects have been taken into account as an integral part of the design. In order to provide the user and the archive with high quality and well-controlled data, it is mandatory to have, during the routine observation phase, all calibration observations as part of the instrument set-up activities and as part of the actual Astronomical Observing Template. We propose here to review the calibration of VISIR observations. After a description of the various hardware tools which have been introduced for calibration purposes (warm calibration unit, distortion grid, pupil imaging optics, wavelength calibration modules), we will present the calibrations in four astronomical categories (spatial resolution, photometry, astrometry and wavelength calibration). Cross-calibrations between the Imager and Spectrometer subsystems will also be addressed.

Paper Details

Date Published: 7 March 2003
PDF: 11 pages
Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); doi: 10.1117/12.461472
Show Author Affiliations
Arnaud J. Claret, CEA Saclay (France)
Pierre-Olivier Lagage, CEA Saclay (France)
Eric Pantin, CEA Saclay (France)
Didier Dubreuil, CEA Saclay (France)
Philippe Galdemard, CEA Saclay (France)
Anton Schoenmaker, Netherlands Foundation for Research in Astronomy (Netherlands)
Jan-Willem Pel, Netherlands Foundation for Research in Astronomy (Netherlands)

Published in SPIE Proceedings Vol. 4841:
Instrument Design and Performance for Optical/Infrared Ground-based Telescopes
Masanori Iye; Alan F. M. Moorwood, Editor(s)

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