Aiming to fill a crucial gap in our observational knowledge of the early Universe,
experiments around the world continue to attempt to verify the claimed detection of the …

Photons emitted during cosmological hydrogen ($500\lesssim z\lesssim 1600$) and helium
recombination ($1600\lesssim z\lesssim 3500$ for He ii $\to $ He i, $5000\lesssim z\lesssim …

Global 21-cm experiments require exquisitely precise calibration of the measurement
systems in order to separate the weak 21-cm signal from Galactic and extragalactic …

Detection of the global redshifted 21-cm signal is an excellent means of deciphering the
physical processes during the Dark Ages and subsequent Epoch of Reionization (EoR) …

The H i 21 cm global signal from the Cosmic Dawn and the Epoch of Reionization (EoR)
offers critical insights into the evolution of our Universe. Yet, its detection presents significant …

Detection of the redshifted 21-cm signal of neutral hydrogen from the cosmic dawn and the
epoch of reionization (EoR) is one of the final frontiers of modern observational cosmology …

We present design equations for a two-element closely-spaced interferometer for measuring
the noise temperature of a uniform sky. Such an interferometer is useful for observing highly …

The redshifted 21-cm signal from neutral hydrogen has the potential to provide valuable
information on the the periods of cosmic dawn and epoch of reionisation (CD/EoR). The sky …

Measurement of integrated sky noise is desirable in radio astronomy for flux density
calibration and cosmological signal detection. The ultimate goal is to make such …

The epoch of cosmic dawn and reionization (CD/EoR) is one of the most important time
periods of the history of the universe when the first sources of radiation like stars and …