The quest for high-redshift radio galaxies. II. Discovery of the most powerful known radio galaxy at z=4.946.
As part of our quest for high-redshift radio galaxies (HzRGs), we present the results obtained from optical spectroscopy leading to the confirmation of one HzRG candidate selected using the Lyman break technique. The optical emission, associated with the radio source TXS 2354+015, exhibits a prominent drop in the r ban...