High Dynamic Range Imaging: Squint, Pointing, Peeling and all that Jazz
Juan USON
NRAO Charlottesvillle
Résumé :
Modern Radio telescopes such as the EVLA, ALMA and the SKA promise
unprecedented sensitivity. Most observations will result in images
with high dynamic range. Detailed knowledge of the characteristitcs
of the telescopes as well as new algorithms will be necessary to
extract the best results from the data.
I shall begin with the basics and formulate the problem in simple
terms and discuss some modern algorithms as well as some others that
are currently under development. These include algorithms to correct
for the actual properties of the primary beam of the antennas, imaging
of extended emission, non-isoplanaticism, as well as automatic
recognition of real signal in the presence of noise and artifacts.
I shall include a brief demonstration of one such algorithm using
actual data.
