Short Spacing Synthesis from a Primary Beam Scanned Interferometer

Дата и время публикации : 2012-12-10T22:29:13Z

Авторы публикации и институты :
R. D. Ekers
A. H. Rots

Ссылка на журнал-издание: Proc. IAU Colloq. 49, C. van Schooneveld (ed.), Reidel Publishing Co. (Astrophysics and Space Science Library. Volume 76), 1979., p.61
Коментарии к cтатье: 3 pages; IAU Colloquium 49 (Groningen, Netherlands, 1978): “Image Formation from Coherence Functions in Astronomy”
Первичная категория: astro-ph.IM

Все категории : astro-ph.IM

Краткий обзор статьи: Aperture synthesis instruments providing a generally highly uniform sampling of the visibility function often leave an unsampled hole near the origin of the (u,v)-plane. In this paper, originally published in 1979, we first describe the common solution of retrieving the information from scans made with a large single-dish telescope. However, this is not the only means by which short spacing visibility data can be obtained. We propose an alternative technique that employs a short-baseline interferometer to scan the entire primary beam area. The obvious advantage is that a short-baseline pair from the synthesis instrument can be used, ensuring uniformity in instrumental characteristics. This technique is the basis for the mosaicing algorithms now commonly used in aperture synthesis radio astronomy imaging.

Category: Physics