Intra-Day Variability and the Interstellar Medium Towards 0917+624

D. L. Jauncey, J. -P. Macquart

Published 2001-02-11Version 1

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. (see also astro-ph/0102050)