The microarcsecond quasar J1819+3845

Details The microarcsecond quasar J1819+3845 The microarcsecond quasar J1819+3845

2000-12-08

arxiv.org/abs/astro-ph/0012188v1

Astronomy and Astrophysics

Astrophysics

3 pages, 1 figure, for IAU Symposium 205: Galaxies and their Constituents at the Highest Angular Resolutions, Manchester UK, A

Scientific paper

We present new WSRT observations of the micro-arcsecond quasar J1819+3845. All short term variations are attributed to interstellar scintillation of a source which is at most 30 micro-arcseconds in diameter. The timescale of the modulations changes over the year, which we interpret as due to a peculiar velocity of the scattering medium. The scintillation behaviour can be used to determine sub-structure in the source.

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