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