The JWST Near Infrared Spectrograph (NIRSpec) has 4 observing modes for near-infrared multi-object, integral field unit, fixed slit or bright object time-series spectroscopy from 0.6–5.3 μm.
NIRSpec has 4 observing modes:
- Multi-object spectroscopy obtains simultaneous spectroscopy of multiple science targets within a 3.6' × 3.4' field of view using the micro-shutter assembly (MSA).
- IFU spectroscopy uses the integral field unit to provide spatially resolved spectroscopy over a 3" × 3" square region.
- Fixed slits spectroscopy provides 5 fixed slits for obtaining high sensitivity single object spectroscopy.
- Bright object time-series spectroscopy uses a 1.6" × 1.6" fixed slit aperture for observations of bright sources that require stable, high throughput time-resolved spectroscopy.
JWST User Documentation Home
Near Infrared Spectrograph, NIRSpec
NIRSpec Multi-Object Spectroscopy
NIRSpec IFU Spectroscopy
NIRSpec Fixed Slits Spectroscopy
NIRSpec Bright Object Time Series Spectroscopy
JWST Astronomers Proposal Tool, APT
JWST APT website
JWST Exposure Time Calculator, ETC
JWST ETC website