An Intra-Day Variability (IDV) Survey of Southern flat-spectrum radio Sources

Details An Intra-Day Variability (IDV) Survey of Southern flat-spectrum radio Sources An Intra-Day Variability (IDV) Survey of Southern flat-spectrum radio Sources

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.5703k&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #57.03; Bulletin of the American Astronomical Society, Vol. 30, p.903

Astronomy and Astrophysics

Astronomy

Scientific paper

We have carried out a survey of 126 flat-spectrum compact radio sources at 2.4, 4.8 and 8.6 GHz with the Compact Array of the Australia Telescope National Facility. Flux densities were measured with an accuracy of 0.5/%, and all sources that showed variations of 2/% or greater over intervals of up to 2 days were noted. We find that the fraction of sources that show intra-day variations is roughly constant at 6/% of the sample at each of the survey frequencies, 2.4, 4.8 and 8.6 GHz. We show the sky distribution of the IDV sources and discuss the Survey results in terms of interstellar scattering as the cause of the variations.

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