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Session 57 - Interstellar Scattering and Scintillation as Tools in Radio Astronomy.
Display session, Wednesday, June 10
Atlas Ballroom,

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

L. Kedziora-Chudczer (ATNF, CSIRO and RCTA, Sydney U.), D. L. Jauncey, M. Wieringa, J. E. Reynolds, A. K. Tzioumis (ATNF, CSIRO), G. D. Nicolson (Hartebeesthoek Radio Astron. Obs.), M. A. Walker (RCTA, Sydney U.)

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/that showed variations of 2/up to 2 days were noted. We find that the fraction of sources that show intra-day variations is roughly constant at 6/4.8 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.

Program listing for Wednesday