Source-noise in radio synthesis images
K. R. Anantharamaiah, Avinash A. Deshpande, V. Radhakrishnan, R. D. Ekers, Timothy J. Cornwell, W. M. Goss · International Astronomical Union Colloquium · 1991
Abstract We discuss the distribution of source- and receiver- noise in radio synthesis images and show that the source-noise is maximum at the position of the source but also appears in the off-source region because of the sidelobes. Analytical expressions are derived for the rms noise at any location of both “total-power” and “correlation” images. We show that under certain conditions, deconvolution can remove the source noise from the off-source region in snap-shot images. Some of the results are verified experimentally.