Volume 370, Number 1, April IV 2001
|Page(s)||L9 - L12|
|Published online||15 April 2001|
Intra-day variability and the interstellar medium towards 0917+624
Australia Telescope National Facility, CSIRO, Epping, NSW 2121, Australia
2 Research Centre for Theoretical Astrophysics, School of Physics, University of Sydney, NSW 2006, Australia
Corresponding author: D. L. Jauncey, email@example.com
Accepted: 14 February 2001
The intra-day variable source 0917+624 displays annual changes in its timescale of variability. This is explained in terms of a scintillation model in which changes in the variability timescale are due to changes in the relative velocity of the scintillation pattern as the Earth orbits the sun.
Key words: quasars, 0917+624 / radio sources: ISM: structure / scattering
© ESO, 2001
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