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Empirical covariance modeling for 21 cm power spectrum estimation: A method demonstration and new limits from early Murchison Widefield Array 128-tile data EMPIRICAL COVARIANCE MODELING for 21 CM POWER .. JOSHUA S. DILLON et al.

Dillon, Joshua; Neben, A R; Hewitt, Jacqueline N; Tegmark, Max; Barry, N; Beardsley, A; Bowman, J D; Briggs, Franklin; Carroll, P; de Oliveira-Costa,, A; Ewall-Wice, Aaron; Feng, Lu; Greenhill, Lincoln; McKinley, Benjamin; Offringa, Andre; Loeb, Abraham; Deshpande, Avinash; Prabu, T; Srivani, K. S.; Oberoi, D


The separation of the faint cosmological background signal from bright astrophysical foregrounds remains one of the most daunting challenges of mapping the high-redshift intergalactic medium with the redshifted 21 cm line of neutral hydrogen. Advances in mapping and modeling of diffuse and point source foregrounds have improved subtraction accuracy, but no subtraction scheme is perfect. Precisely quantifying the errors and error correlations due to missubtracted foregrounds allows for both the...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Physical Review D-Particles, Fields, Gravitation and Cosmology
DOI: 10.1103/PhysRevD.91.123011


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