Colloquium on 5 May 2016
Unconventional Radio Astronomy


Title: Unconventional Radio Astronomy
Speaker: Jonathan Zwart (UWC/UCT)
Date: Thursday, 5 May 2016
Time: 11:00 - 12:00
Venue: SAAO Auditorium


Imaging – be it optical or radio – is a fine art, as is the ensuing extraction of celestial sources. Typically one finds peaks down to some threshold (5 sigma, say) and writes off what’s left. But there is information down there – physics that Bayes’ theorem can get at and an avenue that’s crucial for forthcoming surveys. So I’ll explain how we can wring out that information and what we can discover from it.

But it’s also possible – in the radio at least – to examine the raw interferometric data in order to bypass imaging completely. In another coup for Bayes, this challenging exercise sheds light on the systematic coupling of sky and telescope, a task currently impossible via the imaging route. I’ll update you on the latest results from this exercise.

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