- What is the primary beam response of an interferometer with unequal elements?
- 7th Symposium of the European VLBI Network , Toledo, Spain
- Book/source title
- Proceedings of the 7th Symposium of the European VLBI Network on New Developments in VLBI Science and Technology
- Pages (from-to)
- Document type
- Conference contribution
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
The EVN stations encompass elements with a range of diameters, even including an interferometer (the Westerbork Telescope, with up to 14 elements used together as a tied array). In combination, the various station pairs will each produce their own primary beam envelopes, with which the interferometer pattern is modulated. People sometimes forget that in the case of unequal elements, this combined primary beam envelope is different from the beam of each element separately. The reason for this is reviewed, the results for a number of station pairs are summarized, and some of the practical consequences are discussed. The increased interest in wide-field applications, as illustrated by several recent results, underlines the need for a proper determination of the interferometer beam envelope. (astro-ph/0412687)
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