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.

Jhp, W., Balbi, A., Borrill, J., Ferreira, P., Hanany, S., Jaffe, A., et al. (2001). Asymmetric beams in cosmic microwave background anisotropy experiments. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 132(1), 1-17.

Asymmetric beams in cosmic microwave background anisotropy experiments

BALBI, AMEDEO;
2001

Abstract

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.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/05 - Astronomia e Astrofisica
English
cosmic microwave background; cosmology : theory; large-scale structure of universe; methods : data analysis; methods : numerical
Jhp, W., Balbi, A., Borrill, J., Ferreira, P., Hanany, S., Jaffe, A., et al. (2001). Asymmetric beams in cosmic microwave background anisotropy experiments. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 132(1), 1-17.
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
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/53986
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