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| Paper: |
Self-noise in interferometers |
| Volume: |
19, Radio Interferometry: Theory, Techniques, and Applications, IAU Colloquium 131 |
| Page: |
1 |
| Authors: |
Vivekanand, M.; Kulkarni, S. R. |
| Abstract: |
The distribution of noise in images synthesized by radio interferometers is studied, focusing particularly on the noise due to source power fluctuations. For a total power interferometer, the rms fluctuation in the image consists of a term that is constant all over the map, which is the uncorrelated system noise divided by the number of telescopes in the interferometer, and a term that is the image itself. For a correlation interferometer the expression is not so simple but is qualitatively similar. The results are consistent with intuitive expectations in various observing situations. Similarities in self-noise at optical and radio wavelengths are found. |
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