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Proceedings Paper

Wavelength calibration of the JWST near-infrared spectrograph (NIRSpec)
Author(s): Stephan M. Birkmann; Torsten Böker; Pierre Ferruit; Giovanna Giardino; Peter Jakobsen; Guido de Marchi; Marco Sirianni; Maurice B. J. te Plate; Jean-Christophe Savignol; Xavier Gnata; Thomas Wettemann; Bernhard Dorner; Giovanni Cresci; Fabiàn Rosales-Ortega; Martin Stuhlinger; Richard Cole; Jason Tandy; Chris Brockley-Blatt
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Paper Abstract

The Near Infrared Spectrograph (NIRSpec) is one of four science instruments aboard the James Webb Space Telescope (JWST) that is to be launched later this decade. NIRSpec is sensitive in the wavelength range from 0.6 to 5.0 μm and operates at temperatures ≤ 40 K. It offers multi-object, fixed slit, and integral field spectroscopy with seven selectable dispersers. The on-ground spectrophotometric calibration of the instrument is performed by means of continuum and line emission lamps. NIRSpec also contains an internal calibration assembly (CAA) that will provide the wavelength and radiometric calibration in orbit. Due to thermal constraints, the CAA features low power tungsten filament lamps in combination with long-pass and Fabry-Perot-like interference filters, which need to be calibrated at instrument level. We will report on the wavelength calibration of the NIRSpec flight model and the CAA, carried out during the first cryogenic performance testing.

Paper Details

Date Published: 28 September 2011
PDF: 9 pages
Proc. SPIE 8150, Cryogenic Optical Systems and Instruments XIII, 81500B (28 September 2011); doi: 10.1117/12.893896
Show Author Affiliations
Stephan M. Birkmann, European Space Agency, ESTEC (Netherlands)
Torsten Böker, European Space Agency, ESTEC (Netherlands)
Pierre Ferruit, European Space Agency, ESTEC (Netherlands)
Giovanna Giardino, European Space Agency, ESTEC (Netherlands)
Peter Jakobsen, European Space Agency, ESTEC (Netherlands)
Guido de Marchi, European Space Agency, ESTEC (Netherlands)
Marco Sirianni, European Space Agency, ESTEC (Netherlands)
Maurice B. J. te Plate, European Space Agency, ESTEC (Netherlands)
Jean-Christophe Savignol, European Space Agency, ESTEC (Netherlands)
Xavier Gnata, EADS Astrium GmbH (Germany)
Thomas Wettemann, EADS Astrium GmbH (Germany)
Bernhard Dorner, Observatoire de Lyon (France)
Univ. de Lyon (France)
Ctr. de Recherche Astrophysique de Lyon, CNRS (France)
Giovanni Cresci, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Fabiàn Rosales-Ortega, CSIC - INTA (Spain)
Martin Stuhlinger, European Space Astronomy Ctr. (Spain)
Richard Cole, Univ. College London (United Kingdom)
Jason Tandy, Univ. College London (United Kingdom)
Chris Brockley-Blatt, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 8150:
Cryogenic Optical Systems and Instruments XIII
James B. Heaney; E. Todd Kvamme, Editor(s)

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