Wavelength calibration of the JWST near-infrared spectrograph (NIRSpec)

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

doi:10.1117/12.893896

28 September 2011 Wavelength calibration of the JWST near-infrared spectrograph (NIRSpec)

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

Author Affiliations +

Proceedings Volume 8150, Cryogenic Optical Systems and Instruments XIII; 81500B (2011) https://doi.org/10.1117/12.893896
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

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.

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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, and Chris Brockley-Blatt "Wavelength calibration of the JWST near-infrared spectrograph (NIRSpec)", Proc. SPIE 8150, Cryogenic Optical Systems and Instruments XIII, 81500B (28 September 2011); https://doi.org/10.1117/12.893896

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