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Roman Space Telescope
Anticipated Performance Tables
for the
Roman WFI
banner credit: NASA/GSFC
← Back to Anticipated Performance Tables for the Roman WFI
Exposure time requirements to reach fixed signal-to-noise for the slitless grism
Exposure time for grism spectroscopy of a point source
Zodiacal time 1.2x minimum
Zodiacal time 1.44x minimum
Zodiacal time 2.0x minimum
Zodiacal time 3.5x minimum
Exposure time for grism spectroscopy with 0.2 arcsec half light radius
Zodiacal time 1.2x minimum
Zodiacal time 1.44x minimum
Zodiacal time 2.0x minimum
Zodiacal time 3.5x minimum
Exposure time for grism spectroscopy with 0.3 arcsec half light radius
Zodiacal time 1.2x minimum
Zodiacal time 1.44x minimum
Zodiacal time 2.0x minimum
Zodiacal time 3.5x minimum
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