The Molonglo Radio Source Surveys at 408 MHz

Abstract

One of the basic programs undertaken with the 1 mile Cross-type radio telescope at the Molonglo Radio Observatory has been a systematic survey of the sky south of +18° declination. Commencing in late 1967, the survey has been continuing at a low priority until it is now complete to a declination of −85°, except for some small areas affected by interference or instrumental problems which are being re-observed. A program of ‘deep surveys’ is also being undertaken; this involves multiple observations within narrow strips at selected declinations. The signal-to-noise ratio is some three to five times better than in normal surveying and the confusion limit is approached.