Survey of a complete sample of southern extragalactic radio sources

Details Survey of a complete sample of southern extragalactic radio sources Survey of a complete sample of southern extragalactic radio sources

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105.1680t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 105, no. 5, p. 1680-1689.

Astronomy and Astrophysics

Astronomy

31

Bl Lacertae Objects, Extragalactic Radio Sources, Quasars, Radio Spectra, Data Reduction, Radio Astronomy, Statistical Analysis

Scientific paper

A complete sample of bright Southern (declination 0 to - 25 deg) BL Lacertae objects (BLOs) and quasars at 2.3, 4.8, 8.4, 22, 43, 90, and 230 GHz were observed. Properties of the different classes of quasars were compared, by using statistical methods, to determine whether there are significant differences in the radio spectrum and variability of these sources. The overall shape of the radio spectrum shows constancy over 10-20 years, and the measurements and data from the Kuhr catalog, the HartRAO observations, the Itapetinga observations, and the SEST observations agree very well. Low polarized quasars have the smallest variabilities and high polarized quasars tend to have the greatest variabilites. Small samples of BLOs make it very difficult to draw precise conclusions of their variability behavior.

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