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Abstract:
As First Light from the first stars transforms the universe from the
dark ages into cosmic dawn, the history may be traced in redshifted
21-cm from neutral hydrogen in the gas. Efforts to build precision
radiometers over the 40-200 MHz band to detect this faint signal are
beginning to yield results of significance to the theory, thus
constraining the starlight of the earliest galaxies. I will present
the progression in SARAS radiometers that have been deployed in remote
sites in India - at the Timbaktu collective, in the trans-Himalayan
plateau and, most recently, floated on a remote lake. I will then
discuss the impact of the data on the astrophysics of the Epoch of
Reionisation and Cosmic Dawn, our attempt to confirm the EDGES
detection, and the road ahead.
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