The 50CORON imaging mode is useful for imaging of faint targets next to bright ones. The STIS CCD optics include a Lyot stop, which suppresses the wings of the PSF. See CCD Clear Imaging-50CCD for sensitivities, throughputs, and encircled energies. See Section 12.10 for the PSF and for a discussion of coronagraphic imaging. A diagram showing the layout of the 50CORON aperture and the wedge positions, can be seen in Figure 12.8:
Recommended for broad-band coronagraphic imaging. Observers considering use of this mode may also want to investigate ACS coronagraphic imaging.
| Pivot  (Å) |
FWHM (Å) |
AB mag zeropoint |
Speak |
B |
R80 (arcsec) |
Flux in central pixel |
|---|---|---|---|---|---|---|
| 5851.5 |
4410.3 |
26.386 |
|
4898.9 |
0.16 |
14% |
|
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