Search for megaparsec giant radio sources from TGSS
  One of the great astrophysical radio structures in the Universe is giant
radio sources (GRSs) which have a linear projected size of nearly 0.7 Mpc or
more. We systematically search for giant radio galaxies from the TIFR GMRT Sky
Survey Alternative Data Release 1 (TGSS ADR1) at 150 MHz. Our search area
covers 36,900 square degrees of the sky between $-$53 deg and +90 deg DEC,
which is 90 per cent of the total sky. We have identified 53 GRSs with a linear
size range between 0.7 Mpc to 1.82 Mpc. We study characteristic parameters like
identification of candidates, angular and projected linear size, redshift,
spectral index, radio power, and black hole mass of GRSs. Among listed sources,
four giant radio sources have sizes above 1.5 Mpc and one has a size of $\sim$
1.82 Mpc. We also find that one giant radio galaxy (GRG) is situated in a dense
galaxy cluster environment, which is identified by using optical data.
