Deconvolving spectra of lensing galaxies, QSO hosts, and more ...

Details Deconvolving spectra of lensing galaxies, QSO hosts, and more ... Deconvolving spectra of lensing galaxies, QSO hosts, and more ...

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999msngr..97...26c&link_type=abstract

ESO-Messenger, Vol. 97, p. 26 (1999)

Astronomy and Astrophysics

Astrophysics

5

Scientific paper

High spatial resolution undoubtedly plays a key role in most major advances in observational astrophysics. In this context, considerable effort has been devoted to the development of numerical methods aimed at improving the spatial resolution of astronomical images. However, the most commonly used techniques (e.g., Richardson 1972, Lucy 1974, Skilling & Bryan 1984) tend to produce the so-called “deconvolution artefacts” (oscillations in the vicinity of high spatial frequency structures) which alter the photometric and astrometric properties of the original data. Recently, Magain, Courbin & Sohy (1998ab; hereafter MCS) proposed and implemented a new deconvolution algorithm which overcomes such drawbacks. Its success is mainly the consequence of a deliberate choice to achieve an improved resolution rather than an infinite one, hence avoiding retrieving spatial frequencies forbidden by the sampling theorem.

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