|STIS Instrument Handbook for Cycle 25|
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 12.6Recommended for broad-band coronagraphic imaging. Observers considering use of this mode may also want to investigate ACS coronagraphic imaging.
Pivot λ (Å) Speak Bλ R80 (arcsec)