Astrometric and Wavelength Calibration of the NIRSpec Instrument during Commissioning using a model-based approach
Publikation: Bidrag til tidsskrift › Konferenceartikel › Forskning › fagfællebedømt
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Astrometric and Wavelength Calibration of the NIRSpec Instrument during Commissioning using a model-based approach. / Lutzgendorf, Nora; Giardino, Giovanna; Alves de Oliveira, Catarina; Zeidler, Peter; Ferruit, Pierre; Jakobsen, Peter; Kumari, Nimisha; Rawle, Tim; Birkmann, Stephan M.; Boker, Torsten; Proffitt, Charles; Sirianni, Marco; Te Plate, Maurice; Sohn, Sangmo Tony.
I: Proceedings of SPIE, Bind 12180, 121800Y, 27.08.2022.Publikation: Bidrag til tidsskrift › Konferenceartikel › Forskning › fagfællebedømt
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TY - GEN
T1 - Astrometric and Wavelength Calibration of the NIRSpec Instrument during Commissioning using a model-based approach
AU - Lutzgendorf, Nora
AU - Giardino, Giovanna
AU - Alves de Oliveira, Catarina
AU - Zeidler, Peter
AU - Ferruit, Pierre
AU - Jakobsen, Peter
AU - Kumari, Nimisha
AU - Rawle, Tim
AU - Birkmann, Stephan M.
AU - Boker, Torsten
AU - Proffitt, Charles
AU - Sirianni, Marco
AU - Te Plate, Maurice
AU - Sohn, Sangmo Tony
PY - 2022/8/27
Y1 - 2022/8/27
N2 - The NIRSpec instrument for the James Webb Space Telescope (JWST) is a highly versatile near-infrared spectrograph that can be operated in various observing modes, slit apertures, and spectral resolutions. Obtaining dedicated calibration data for all possible combinations of aperture and disperser is an intractable task. We have therefore developed a procedure to derive a highly realistic model of the instrument's optical geometry across the entire field of view, using calibration data acquired through only a subset of NIRSpec apertures, which nevertheless allows the light paths within the spectrograph to be accurately computed for all apertures and all observing modes. This parametric instrument model thus provides the basis for the extraction of wavelength-calibrated spectra from any NIRSpec exposure, regardless of observing mode or aperture used. Optimizing the NIRSpec instrument model and deriving its final wavelength and astrometric calibration was one of the most crucial elements of the NIRSpec commissioning phase. Here, we describe the process of re-fitting the NIRSpec instrument model with in-orbit commissioning data, and present its final performance in terms of wavelength accuracy and astrometric calibration.
AB - The NIRSpec instrument for the James Webb Space Telescope (JWST) is a highly versatile near-infrared spectrograph that can be operated in various observing modes, slit apertures, and spectral resolutions. Obtaining dedicated calibration data for all possible combinations of aperture and disperser is an intractable task. We have therefore developed a procedure to derive a highly realistic model of the instrument's optical geometry across the entire field of view, using calibration data acquired through only a subset of NIRSpec apertures, which nevertheless allows the light paths within the spectrograph to be accurately computed for all apertures and all observing modes. This parametric instrument model thus provides the basis for the extraction of wavelength-calibrated spectra from any NIRSpec exposure, regardless of observing mode or aperture used. Optimizing the NIRSpec instrument model and deriving its final wavelength and astrometric calibration was one of the most crucial elements of the NIRSpec commissioning phase. Here, we describe the process of re-fitting the NIRSpec instrument model with in-orbit commissioning data, and present its final performance in terms of wavelength accuracy and astrometric calibration.
KW - James Webb Space Telescope
KW - JWST
KW - Near-Infrared Spectrograph
KW - NIRSpec
KW - Commissioning
KW - Wavelength Calibration
KW - Astrometric Calibration
KW - INFRARED SPECTROGRAPH NIRSPEC
U2 - 10.1117/12.2630069
DO - 10.1117/12.2630069
M3 - Conference article
VL - 12180
JO - Progress in Biomedical Optics and Imaging
JF - Progress in Biomedical Optics and Imaging
SN - 1605-7422
M1 - 121800Y
T2 - Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave
Y2 - 17 July 2022 through 22 July 2022
ER -
ID: 325337055