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| Space Telescope Science Institute |
| STIS Instrument Handbook |
| help@stsci.edu |
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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 12.11 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 12.6
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