Speaker
Description
The Remote HI eNvironment Observer (RHINO), currently under construction at Jodrell Bank Observatory, is an experiment aiming to observe between 60-85 MHz to measure the sky-averaged 21-cm absorption feature redshifted from the Cosmic Dawn. This signal is obscured by galactic synchrotron foregrounds that are brighter by over four orders of magnitude. Additionally, instrumental systematics impart additional spectral structure that can hinder extraction of the cosmological signal if not sufficiently calibrated for. This talk will outline how RHINO employs a Bayesian approach to calibrating instrumental systematics using Gaussian Constrained Realisations and propagating uncertainties into absolutely calibrated measurements of the low-frequency sky.