Wavelet domain Bayesian denoising of string signal in the cosmic microwave background

Details Wavelet domain Bayesian denoising of string signal in the cosmic microwave background Wavelet domain Bayesian denoising of string signal in the cosmic microwave background

2008-11-08

arxiv.org/abs/0811.1267v2

Mon. Not. R. Astron. Soc. 398 (2009) 1317

Astronomy and Astrophysics

Astrophysics

16 pages, 11 figures. Version 2 matches version accepted for publication in MNRAS. Changes include substantial clarifications

Scientific paper

10.1111/j.1365-2966.2009.14978.x

An algorithm is proposed for denoising the signal induced by cosmic strings in the cosmic microwave background (CMB). A Bayesian approach is taken, based on modeling the string signal in the wavelet domain with generalized Gaussian distributions. Good performance of the algorithm is demonstrated by simulated experiments at arcminute resolution under noise conditions including primary and secondary CMB anisotropies, as well as instrumental noise.

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