NIRSpec - Near-IR Multi-Object Spectrograph for JWST

Details NIRSpec - Near-IR Multi-Object Spectrograph for JWST NIRSpec - Near-IR Multi-Object Spectrograph for JWST

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20711513j&link_type=abstract

American Astronomical Society Meeting 207, #115.13; Bulletin of the American Astronomical Society, Vol. 37, p.1352

Physics

Optics

Scientific paper

NIRSpec will be the first slit-based astronomical multi-object spectrograph to fly in space, and is designed to provide spectra of faint objects over the near-infrared 1.0 - 5.0 micron wavelength range at spectral resolutions of R=100, R=1000 and R=2700. The instrument's all-reflective wide-field optics, together with its novel MEMS-based programmable micro-shutter array slit selection device and its large format low-noise HgCdTe detector arrays, combine to allow simultaneous observations of >100 objects within a 3.4 × 3.5 arcmin field of view with unprecedented sensitivity. A selectable 3 × 3 arcsec Integral Field Unit and five fixed slits are also available for detailed spectroscopic studies of single objects. NIRSpec is presently expected to be capable of reaching a continuum flux of 20 nJy (AB>28) in R=100 mode, and a line flux of 6 × 10-19 erg s-1 cm-2 in R=1000 mode at S/N>3 in 104 s.
NIRSpec is being built for the European Space Agency (ESA) by EADS Astrium as part of ESA's contribution to the JWST mission. The NIRSpec micro-shutter and detector arrays are provided by NASA/GSFC.

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