Extragalactic
Radio Sources (contÕd)
¥Up to 200 GHz, radio sources dominate the errors; higher than that, dusty galaxies dominate.
¥However, not terribly important while l < 700 or so.
¥Even non-radio galaxies still emit microwave radiation.
¥MAP and Planck probably wonÕt have interference from extragalactic radio sources.