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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Chi tiết về thư mục
Những tác giả chính: 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
Định dạng: Journal article
Ngôn ngữ:English
Được phát hành: 2001
Miêu tả
Tóm tắt: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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