Image Quality
Image quality for a point source is characterized in terms of
encircled energy/intensity
vs. radius.
Spectroscopic image quality for point sources is characterized
in terms of encircled energy or spatial profiles.
Spectroscopic Image Quality for Point Sources
| Encircled Energy Tables |
Spatial Profile Plots |
| G140L, G140M, G230L, G230M |
G140L, G140M, G230L, G230M |
| G230LB, G230MB |
G230LB, G230MB |
| G430L, G430M, G750L, G750M |
G430L, G430M, G750L, G750M |
| E140M, E230M |
E140M, E230M |
| E140H, E230H |
E140H, E230H |
Coronagraphic imaging
with STIS reduces PSF wings
by an order of magnitude several arcsec from the source.
The NUV-MAMA detector PSF has broader wings
than the FUV-MAMA PSF because the NUV photocathode coating is on the
dewar window instead of directly on the
microchannel plate surface.
A
new geometric-distortion solution
for the NUV-MAMA has been obtained and a new geometric distortion table is in
full use by the OTFR system.
First-order spectra of point sources contain weak
satellite spectra
of PSF Airy rings. Separation increases with wavelength.
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