On the Prospects of Measuring the Cosmic Dawn 21-cm Power Spectrum using
  the Upgraded Giant Meterwave Radio Telescope (uGMRT)
  A recent observation by the EDGES collaboration shows a strong absorption
signal in the global 21-cm spectrum from around a redshift of $z = 17$. This
absorption is stronger than the maximum prediction by existing models and
indicates that the spatial fluctuations of the \HI 21-cm brightness temperature
at Cosmic Dawn could be an order of magnitude larger than previously expected.
In this paper, we investigate the prospects of detecting the \HI 21-cm power
spectrum from Cosmic Dawn using uGMRT. We find that a $10\sigma$ detection of
the enhanced \HI 21-cm signal power spectrum is possible within $70, 140$ and
$400$ Hours of observation for an optimistic, moderate and pessimistic scenario
respectively, using the Band-1 of uGMRT. This could be an useful probe of the
interaction between the baryon and dark matter particles in the early Universe.
We also present a comparison of the uGMRT predictions with those for the future
SKA-Low.
