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- W2484293438 endingPage "3093" @default.
- W2484293438 startingPage "3069" @default.
- W2484293438 abstract "We construct foreground simulations comprising spatially correlated extragalactic and diffuse Galactic emission components and calculate the ‘intrinsic’ (instrument-free) two-dimensional spatial power spectrum and the cylindrically and spherically averaged three-dimensional k-space power spectra of the Epoch of Reionization (EoR) and our foreground simulations using a Bayesian power spectral estimation framework. This leads us to identify a model-dependent region of optimal signal estimation for our foreground and EoR models, within which the spatial power in the EoR signal relative to the foregrounds is maximized. We identify a target field-dependent region, in k-space, of intrinsic foreground power spectral contamination at low k⊥ and k∥ and a transition to a relatively foreground-free intrinsic EoR window in the complement to this region. The contaminated region of k-space demonstrates that simultaneous estimation of the EoR and foregrounds is important for obtaining statistically robust estimates of the EoR power spectrum; biased results will be obtained from methodologies that ignore their covariance. Using simulated observations with frequency-dependent uv-coverage and primary beam, with the former derived for the Hydrogen Epoch of Reionization Array in 37-antenna and 331-antenna configuration, we recover instrumental power spectra consistent with their intrinsic counterparts. We discuss the implications of these results for optimal strategies for unbiased estimation of the EoR power spectrum." @default.
- W2484293438 created "2016-08-23" @default.
- W2484293438 creator A5010767955 @default.
- W2484293438 creator A5034792105 @default.
- W2484293438 creator A5051640991 @default.
- W2484293438 creator A5072981488 @default.
- W2484293438 date "2016-07-28" @default.
- W2484293438 modified "2023-10-14" @default.
- W2484293438 title "Contamination of the Epoch of Reionization power spectrum in the presence of foregrounds" @default.
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