That allowed the scientists to better determine the size and position of the radio source.
It can also be seen in infrared and is a weak radio source.
In July 2006 a very strong radio source has been found using the radiometer.
The telescope was used to produce the 5C catalogue of radio sources.
One reason for this is the proliferation and strengthening of radio sources.
Clearly radio sources must start small and grow larger.
They headed to the radio sources first of all.
Finally the area around the telescopes must be protected against contamination by other radio sources.
Many were recorded as radio sources with no corresponding visible object.
For months they had progressed, like a persistent message being sent from a distant radio source.