NED Abstract 
Copyright by American Astronomical Society.
Reproduced by permission

1992ApJS...80..137J

             THE STRUCTURE OF SOUTHERN EXTRAGALACTIC RADIO SOURCES

                       PAUL A. JONES AND W. BRUCE McADAM
Department of Astrophysics, School of Physics, University of Sydney, NSW
                             2006 Australia
             Received 1991 July 16; accepted 1991 October 9

                                ABSTRACT
   We report the structure of extragalactic radio sources south of
declination -30^deg^ that have been imaged with the Molonglo observatory
Synthesis Telescope (MOST) at 843 MHz with a resolution of 44" Our sample
includes those sources noted in the Molonglo Reference Catalogue (MRC) as
extended (larger than ~1), as well as those noted as multiple-that is,
within 8' of a neighbor and-possibly related. The sample is
representative of the strong extended extragalactic radio sources of the
southern sky, but is not statistically complete.
   We observed 339 sources with either timeshared or full 12 hr
aperture-synthesis observations. The results are given as radio images
and a table of flux densities, positions and, sizes for 383 sources. Most
of the groups of multiple sources are found to be separate, unrelated
sources, as expected, but some are components of larger sources. Some of
the sources flagged as extended in the MRC are also groups of unrelated
sources, confused in the MRC beam. After excluding such random
associations we then determine a confirmed MRC extended sample of 193
sources with flux density greater than 0.4 Jy (at 843 MHz) and size
greater than 0.5. The selection effects and completeness for this sample
are discussed.
   The UK Schmidt southern sky survey was used to make 117 new optical
identifications, and to reexamine previous identifications. The positions
and IIIaJ magnitudes are presented for all sources that now have an
identification, together with their redshifts when known. We present new
redshifts for 14 galaxies from observations with the Anglo-Australian
Telescope.

Subject Headings: galaxies: distances and redshifts - galaxies:
photometry - radio continuum: galaxies surveys - techniques:
interferometric