Astron. Astrophys. Suppl. Ser. 139, 387-392

Polarimetric imaging of large fields in radio astronomy

R.J. Sault¹ - D.C.-J. Bock² - A.R. Duncan³

Send offprint request: R.J. Sault

1 - Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping, N.S.W. 1710, Australia
2 - Radio Astronomy Laboratory, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720, U.S.A.
3 - Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany

Received April 26; accepted June 28, 1999

Abstract:

We introduce and compare schemes to form wide-field polarimetric images from radio-interferometric mosaic and single-dish observations. We concentrate on two schemes based on maximum entropy principles. One scheme deconvolves the four Stokes parameters jointly (simultaneously), the other deconvolves each Stokes parameter separately. We find that the two schemes do not produce substantially different results. Issues of wide-field polarimetric purity are also considered.

Key words: methods: data analysis -- techniques: interferometric