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Comment by watersb

Another tricky thing about pulsar observations is that the integration times are very short.

Obviously. You want the thousands to millions of beats per second.

With short exposure time, not many photons to grab. You need a bigger aperture.

Aericibo used to be a nice telescope for pulsars. Sigh...

China has a huge dish, sort of a next-gen Aericibo, the 500-meter FAST https://en.m.wikipedia.org/wiki/Five-hundred-meter_Aperture_...

At a conference in 2000 or 2001, they had a brief presentation where they noted that they have multiple such geological features that could be used to create such telescopes.

Interferometric arrays have so far been easier to build, I think because they have proven to be capable of more types of observation than single fixed dish, and therefore a better investment.

The NRAO can do long baseline observations that include large single dishes, although Areicibo was never able to do so; they used the Green Bank Telescope. Which is a monster.

https://en.m.wikipedia.org/wiki/Green_Bank_Telescope

https://greenbankobservatory.org/science/telescopes/gbt/

A dedicated VLBI array of FAST-class dishes would be mighty nice, though, and could spend many hours to gravity wave observations.

parent watersb 4 years ago

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