What are the Limits of Wavelength Detection in Modern Telescopes?

[Zman]

What are the longest wavelengths that todays telescopes can detect for?

 

[mgb_phys]

Probably something like lofar (10MHz = 30m)

 

[Zman]

I looked up the Lofar telescope on the web and in a slashdot comment;

http://science.slashdot.org/story/1...cope-Array-Grabs-First-Pulsar-Images?from=rss

it says that it is sensitive to wavelengths as long as 7 metres. Is this a mistake?
I can see that 10Mhz relates to a 30m wavelength.

Are there other telescopes in astronomy that can detect long wavelengths?

 

[mgb_phys]

Probably the 10MHz band isn't built yet. I don't know if it's a particularly important part or just the ultimate limit of the antenna.

Generally long wavelengths haven't been much of a focus, high energy is more sexy.
Probably the most famous is the cambridge (MRAO) pulsar array.