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Hubble Space Telescope
STIS Image Quality

Image quality for a point source is characterized in terms of encircled energy/intensity vs. radius.

Encircled Energy vs. Radius Plots
Detector Filter
CCD Clear Long Pass OIII OII
NUV-MAMA Clear
CIII
Quartz
CN182
MgII CN270
FUV-MAMA Clear Quartz SrF2 LyA

Intensity vs. Radius Plots
Detector Filter
CCD Clear Long Pass OIII OII
NUV-MAMA Clear
CIII
Quartz
CN182
MgII CN270
FUV-MAMA Clear Quartz SrF2 LyA

Encircled Energy and Radial Intensity Tables
Detector Filter
CCD Clear Long Pass OIII OII
NUV-MAMA Clear
CIII
Quartz
CN182
MgII CN270
FUV-MAMA Clear Quartz SrF2 LyA

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.