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The Near-Infrared Spectrograph (NIRSpec) on the James Webb Space Telescope III. Integral-field spectroscopy

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arxiv 2202.03308 v1 pith:563TKG5R submitted 2022-02-07 astro-ph.IM

T. Böker , S. Arribas , N. Lützgendorf , C. Alves de Oliveira , T. L. Beck , S. Birkmann , A. J. Bunker , S. Charlot
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G. de Marchi P. Ferruit G. Giardino P. Jakobsen N. Kumari M. López-Caniego R. Maiolino E. Manjavacas A. Marston S. H. Moseley J. Muzerolle P. Ogle N. Pirzkal B. Rauscher T. Rawle H. W. Rix E. Sabbi B. Sargent M. Sirianni M. te Plate J. Valenti C. J. Willott P. Zeidler
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keywords nirspecintegral-fieldnear-infraredspacespectroscopyarcsecdatadiscuss
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abstract

The Near-Infrared Spectrograph (NIRSpec) on the James Webb Space Telescope (JWST) offers the first opportunity to use integral-field spectroscopy from space at near-infrared wavelengths. More specifically, NIRSpec's integral-field unit can obtain spectra covering the wavelength range $0.6 - 5.3~\mu$m for a contiguous 3.1 arcsec $\times$ 3.2 arcsec sky area at spectral resolutions of $R \approx 100$, 1000, and 2700. In this paper we describe the optical and mechanical design of the NIRSpec integral-field spectroscopy mode, together with its expected performance. We also discuss a few recommended observing strategies, some of which are driven by the fact that NIRSpec is a multipurpose instrument with a number of different observing modes, which are discussed in companion papers. We briefly discuss the data processing steps required to produce wavelength- and flux-calibrated data cubes that contain the spatial and spectral information. Lastly, we mention a few scientific topics that are bound to benefit from this highly innovative capability offered by JWST/NIRSpec.

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Cited by 2 Pith papers

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    Five protostars from 0.16 to 10,000 solar luminosities show nested, onion-like H2 outflows, with higher-excitation gas more collimated and faster, consistent with MHD disk wind launching.

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    astro-ph.GA 2026-08 conditional novelty 6.0 of 10

    The near-infrared excess in the Orion Bar decomposes into a ~700 K component correlated with the 3.3 micrometer aromatic band and a weakly constrained hotter component that is not.

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