  The strength of the HI signal originating from a distant galaxy at a
cosmological distance is several orders of magnitude lower than the foreground
and background noise and hence it is difficult to observe this signal at a
given radio telescope. However, a few recent studies reported the detection of
that signal at the radio band suggests the strength of this signal is somehow
magnified. In this analysis, we study the prospects of detecting this signal at
different frequency bands of the uGMRT where this signal is supposed to be
amplified through the strong gravitational lensing by an isolated neutron star
located in a cosmological distance. Our study shows the effects of the lensing
parameters on the observables of that amplified signal and discusses its
variation with the frequency bands considered here. We present a method to
estimate the position and size of an isolated neutron star using the
signal-to-noise ratio of that signal supposed to be detected at different
frequency bands of the uGMRT. We discuss the scope of multi-messenger astronomy
in the era of HI observation where the estimated lensing parameters can be
cross-validated using the pulsar detection at the X-ray band from the same
location in the sky. Our analysis is equally applicable to any radio telescope
with given specifications.
