Measurement of All-sky Neutral hydrogen Absorption Spectrum (MANAS)
Vinand Prayag, Nivedita Mahesh, Gregg Hallinan, Yanfen Lin, Joseph Lazio, Andrew Romero-Wolf, Judd Bowman, Mike Virgin, Charlie Harnach, Mark Hodges
astro-ph.CO
Submitted: 2026-07-25
Comments: 7 pages, 5 figures, conference
Code: https://github.com/edges-collab/pygsdata
License: http://creativecommons.org/licenses/by-nc-sa/4.0/
The gist: MANAS is a single antenna, ground-based platform built to measure the sky averaged ('global') redshifted 21-cm signal from Cosmic Dawn.
Terminology
Abstract
MANAS is a single antenna, ground-based platform built to measure the sky averaged ('global') redshifted 21-cm signal from Cosmic Dawn. The cosmological signal is expected as a 100-200 mK absorption trough against a foreground of 3-4 orders of magnitude brighter. The current crop of 21-cm experiments are limited by systematics namely the sky, ionosphere, beam, and signal path effects. MANAS combines an achromatic monopole antenna, an absolutely-calibrated receiver, and in-situ beam mapping with the OVRO-LWA, and develops an end-to-end error budget that quantifies each systematic.
Sources
- Constraining the unexplored period between reionization and the dark ages with observations of the global 21 cm signal
- 21-cm cosmology
- A new MWA limit on the 21 cm Power Spectrum at Redshifts $\sim$ 13 $-$ 17
- SARAS 3 CD/EoR Radiometer: Design and Performance of the Receiver
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