NASA's James Webb Space Telescope

Near-Infrared Spectrometer (NIRSpec)

JWST's Near-Infrared Spectrograph (NIRSpec) is a versatile spectroscopic instrument that operates in the 0.6 to 5.3 μm wavelength range.  NIRSpec offers high throughput single object spectroscopy through fixed slits, spatially-resolved integral field unit spectroscopy, and a powerful multi-object spectroscopic mode using a micro-shutter assembly.  NIRSpec also has a bright object time series mode through a wide aperture that provides high throughput/high accuracy spectrophotometric monitoring capabilities to the astronomical community.

  For detailed instrument information, please consult the NIRSpec JWST User Documentation (JDox). 

NIRSpec was built for the European Space Agency by Airbus Industries with the Micro-Shutter Array (MSA) and detector sub-systems fabricated by NASA. Pierre Ferruit is the NIRSpec Principal Investigator.

An example of NIRSpec MOS mode spectra taken with a calibration flat field lamp, providing uniform illumination, and example MSA shutter slitlets using the G140M+F100LP spectral configuration.
An example of NIRSpec MOS mode spectra taken with a calibration flat field lamp, providing uniform illumination, and example MSA shutter slitlets using the G140M+F100LP spectral configuration.  Spectra from the fixed slits are shown in the center.  The failed open MSA shutters appear as single shutter spectra (examples are highlighted at right). The gap between the NIRSpec detectors is not shown to scale.