Next: Introduction
Image Restorations of High Photometric Quality
L. B. Lucy
Space Telescope - European Coordinating Facility, European Southern
Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei München,
Germany
[1]Affiliated to Astrophysics Division, Space Science
Department, European Space Agency
Abstract:
An image restoration technique is described that achieves high
photometric accuracy for both stars and distributed emission. The
technique makes use of observer-supplied information that some objects
in the field are point sources and thereby eliminates the ringing and
photometric bias that arise with conventional restoration procedures.
A hierarchy of codes is described based on this two-channel
decomposition of astronomical images. The more sophisticated of these
codes incorporate simultaneous estimation of the PSF and are thus
especially relevant for ground-based imaging. Observing programs are
described in which these codes effectively transfer the resolution of
HST to ground-based images.
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