A 5-GHz interferometer for microwave background studies

A description is given of a 5-GHz two-element very short baseline interferometer operated at Jodrell Bank for degree-scale studies of Galactic, point source and intrinsic cosmic microwave background emission. This is a high-sensitivity interferometer with 20-K system noise and a bandwidth of nearly...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 1997-03, Vol.286 (1), p.48-57
Main Authors: Melhuish, S. J., Davies, R. D., Davis, R. J., Morgan, A., Daintree, E. J., Hernández-Gonzáles, P. J., Giardino, G., Hopkins, J.
Format: Article
Language:English
Subjects:
atmospheric effects
cosmic microwave background
cosmology: observations
methods: observational
Citations: Items that cite this one
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Description
Summary:A description is given of a 5-GHz two-element very short baseline interferometer operated at Jodrell Bank for degree-scale studies of Galactic, point source and intrinsic cosmic microwave background emission. This is a high-sensitivity interferometer with 20-K system noise and a bandwidth of nearly 350 MHz. Its phase stability from day to day is better than 2° and allows independent data from separate days to be stacked. The interferometer gives receiver noise limited performance with an rms of 25 μK in 2min (0RA) from 26 d of data. The performance of the interferometer is illustrated with observations at Dec. = 40° for baselines of 11λ and 30λ. The astronomical potential of the interferometer is described.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/286.1.48