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Paper: The Micro-Arcsecond Scintillation-Induced Variability (MASIV) VLA Survey
Volume: 290, Active Galactic Nuclei: from Central Engine to Host Galaxy
Page: 347
Authors: Lovell, J. E. J.; Jauncey, D. L.; Tzioumis, A. K.; Bignall, H. E.; Kedziora-Chudczer, L.; Macquart, J.-P.; Rickett, B. J.
Abstract: We are undertaking an Intra-Day Variability (IDV) Survey of 700 flat-spectrum AGN with the VLA at 5 GHz. Current evidence supports interstellar scintillation (ISS) as the mechanism causing IDV at cm wavelengths. While the Survey is still underway, the first results show at least 15% of the sources exhibit IDV, and hence possess microarcsecond scale structure. There is also a strong flux density dependence on the fraction of IDV sources, and some indication that EGRET sources are more likely to exhibit IDV than non-EGRET sources.
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