Foreground modelling via Gaussian process regression: an application to HERA data
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Oxford University Press
Abstract
The key challenge in the observation of the redshifted 21-cm signal from cosmic reionization is its separation from the much brighter foreground emission. Such separation relies on the different spectral properties of the two components, although, in real life, the foreground intrinsic spectrum is often corrupted by the instrumental response, inducing systematic effects that can further jeopardize the measurement of the 21-cm signal. In this paper, we use Gaussian Process Regression to model both foreground emission and instrumental systematics in ∼2 h of data from the Hydrogen Epoch of Reionization Array.
Description
Keywords
Instrumentation: interferometers, Methods: statistical, Dark ages, Reionization, First stars
Citation
Ghosh, A. et al. (2020). Foreground modelling via Gaussian process regression: an application to HERA data. Monthly Notices of the Royal Astronomical Society, 495(3), 2813–2826