Speaker
Phil Bull
(University of Manchester)
Description
The 21cm signal from neutral hydrogen traces cosmic large-scale structure in 3D over an exceptionally wide redshift range. It has proven difficult to disentangle from foreground contamination and instrumental effects however. I will explain how the large dynamic range between signal and foregrounds and stringent spectral calibration requirements make this a difficult data analysis problem. I will then review the Hydra Gibbs sampling framework, which can handle low-frequency radio data from different types of radio telescope.