Asymmetric beams in cosmic microwave background anisotropy experiments

Asymmetric beams in cosmic microwave background anisotropy experiments

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We propose a new formalism to handle asymmetric beams in the data analysis of cosmic microwave background anisotropy experiments. For any beam shape, the formalism finds the optimal circularly symmetric equivalent and is thus easily adaptable to existing data analysis methods. We demonstrate certain...

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Main Authors: Wu, J, Balbi, A, Borrill, J, Ferreira, P, Hanany, S, Jaffe, A, Lee, A, Oh, S, Rabii, B, Richards, P, Smoot, G, Stompor, R, Winant, C
格式: Journal article
语言:English
出版: 2001
实物特征
总结:We propose a new formalism to handle asymmetric beams in the data analysis of cosmic microwave background anisotropy experiments. For any beam shape, the formalism finds the optimal circularly symmetric equivalent and is thus easily adaptable to existing data analysis methods. We demonstrate certain key points by using a simulated highly elliptic beam and the beams and data of the MAXIMA-1 experiment, where the asymmetry is mild. We show that in both cases the formalism does not bias the angular power spectrum estimates. We analyze the limitations of the formalism and find that it is well suited for most practical situations.

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