Flicker of southern extragalactic radio sources at 1.42 GHz.

Details Flicker of southern extragalactic radio sources at 1.42 GHz. Flicker of southern extragalactic radio sources at 1.42 GHz.

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...301...33r&link_type=abstract

Astronomy and Astrophysics, v.301, p.33

Astronomy and Astrophysics

Astrophysics

10

Bl Lacertae Objects, Quasars, Galaxies: Active, Radio Continuum: Galaxies

Scientific paper

Variability of southern extragalactic radio sources on time scales of 1-10 days has been studied at 1.42GHz using a 30-m telescope with a declination range from -9deg to -90deg. Measurements of 18 sources were made in 11 successive nights in each of two observing sessions. Most of the flat-spectrum sources vary a few percent on time scales mainly in the range 2-4 days, a behaviour that could be originated, or at least strongly influenced, by refractive processes in the interstellar medium. A few sources displayed a higher level of activity with rms fluctuations of ~6%. This latter variability could be partially intrinsic to the sources.

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