Unveiling the population of high-redshift radio galaxies using
  centimeter GMRT survey
  Ultra Steep Spectrum (USS) radio sources are one of the efficient tracers of
High Redshift Radio Galaxies (HzRGs). To search for HzRGs candidates, we
investigate properties of a large sample of faint USS sources derived from our
deep 325 MHz GMRT observations combined with 1.4 GHz VLA data on the two
subfields (i.e., VLA-VIMOS VLT Deep Survey (VVDS) and Subaru X-ray Deep Field
(SXDF)) in the XMM-LSS field. The available redshift estimates show that
majority of our USS sample sources are at higher redshifts with the median
redshifts ~ 1.18 and ~ 1.57 in the VLA-VVDS and SXDF fields. In the VLA-VVDS
field, ~ 20% of USS sources lack the redshift estimates as well as the
detection in the deep optical, IR surveys, and thus these sources may be
considered as potential high-z candidates. The radio luminosity distributions
suggest that a substantial fraction (~ 40%) of our USS sample sources are
radio-loud sources, distributed over redshifts ~ 0.5 to 4.
