The Most Distant Radio and X-Ray Source
True colour picture of
GB1428+4217 (the very red object in the center). GB1428+4217 is the third
most distant quasar and the highest redshift radio and X-ray source
currently
known. This picture was taken by the Isaac Newton Telescope at Prime Focus.
Courtesy Isobel Hook (UC Berkeley).
Javier Méndez
jma@ing.iac.es