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Paper: Probing Microarcsecond Structure in AGN using Continuous Flux Density Monitoring
Volume: 402, Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technologies
Page: 217
Authors: Senkbeil, C.; Lovell, J.; Ellingsen, S.; Jauncey, D.; Cimò , G.
Abstract: Active Galactic Nuclei (AGN) exhibit radio flux density variability on a wide range of time scales from hours to years. The rapid cm-wavelength variability on timescales from hours to days has been shown to be caused by interstellar scintillation. Interstellar scintillation implies the presence of microarcsecond scale structure in the scintillating source. We have quasi-continuously monitored the 6.7GHz flux density of six interstellar scintillating sources since 2003 using the University of Tasmania Ceduna Radio Telescope. The launch of the VSOP 2 ASTRO-G mission will allow us to compare the microarcsecond AGN structure at 22 and 43GHz with microarcsecond structure implied by scintillation at 5GHz using the Hobart Interferometer, which will supersede the Ceduna flux density monitoring program in 2009.
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