Browsing Research Articles (Physics) by Author "Bull, Philip"
Now showing items 1-7 of 7
-
Characterization of inpaint residuals in interferometric measurements of the epoch of reionization
Bull, Philip; Pagano, Michael; Liu, Jing; Liu, Adrian (Monthly Notices of the Royal Astronomical Society, 2023)To mitigate the effects of Radio Frequency Interference (RFI) on the data analysis pipelines of 21 cm interferometric instruments, numerous inpaint techniques have been developed. In this paper, we examine the qualitative ... -
Characterizing line-of-sight variability of polarized dust emission with future cmb experiments
Bull, Philip; McBride, Lisa; Hensley, Brandon S (Oxford University Press, 2023)While Galactic dust emission is often accounted for in cosmic microwave background (CMB) analyses by fitting a two-parameter modified blackbody (MBB) model in each pixel, typically a number of such clouds are found along ... -
Cosmology with Phase 1 of the Square Kilometre Array Red Book 2018: Technical specifications and performance forecasts
Bacon, David J; Battye, Richard A.; Bull, Philip (Cambridge University Press, 2020)We present a detailed overview of the cosmological surveys that we aim to carry out with Phase 1 of the Square Kilometre Array (SKA1) and the science that they will enable. We highlight three main surveys: a medium-deep ... -
Direct optimal mapping for 21 cm cosmology: A demonstration with the hydrogen epoch of reionization array
Xu, Zhilei; Hewitt, Jacqueline N.; Bull, Philip (American Astronomical Society, 2022)Motivated by the desire for wide-field images with well-defined statistical properties for 21 cm cosmology, we implement an optimal mapping pipeline that computes a maximum likelihood estimator for the sky using the ... -
The fore ground transfer function for H I intensity mapping signal reconstruction: MeerKLASS and precision cosmology applications
Cunnington, Steven; Wolz, Laura; Bull, Philip (Oxford University Press, 2023)Blind cleaning methods are currently the preferred strategy for handling foreground contamination in single-dish H I intensity mapping surv e ys. Despite the increasing sophistication of blind techniques, some signal loss ... -
Patterns of primary beam non-redundancy in close-packed 21 cm array observations
Choudhuri, Samir; Bull, Philip; Garsden, Hugh (Oxford University Press, 2021)Radio interferometer arrays such as HERA consist of many close-packed dishes arranged in a regular pattern, giving rise to a large number of ‘redundant’ baselines with the same length and orientation. Since identical ... -
Statistical recovery of 21 cm visibilities and their power spectra with gaussian-constrained realizations and gibbs sampling
Bull, Philip; Kennedy, Fraser; Wilensky, Michael J; Burba, Jacob; Choudhuri, Samir (The Astrophysical Journal Supplement Series, 2023)Radio interferometers designed to probe the 21 cm signal from Cosmic Dawn and the Epoch of Reionization must contend with systematic effects that make it difficult to achieve sufficient dynamic range to separate the 21 cm ...