Difference between Einstein and SETI?
24 Oct 2011 19:11:45 UTC
Topic 196031
(moderation:
SETI looks for certain "pulses" in space noise that little green creatures send.
Einstein looks for certain "pulses" in space noise that pulsars send.
Are there radical differences between SETI and Einstein methods?
Difference between Einstein and SETI?
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I don't know any details about SETI's astropulse applications, but one difference might be that Einstein@Home's app is specialized to find pulses from a source that is in a very close orbit (orbital periods on the order of minutes or hours rather than months or years) around another body (or their common barycenter). One might think that "little green men" would also send pulses from (say) a planet or artificial satellite in orbit around a star, probably in a much wider orbit.
HB
RE: Are there radical
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SETI@Home tries to find artifical signs ( e.g. prime numbers ).
Einstein@Home tries to find natural ( e.g. periodical ) signals.
RE: RE: SETI looks for
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Astropulse is looking for signals with much higher pulse repetition frequencies than Einstein, in the range of tens or hundreds of Hz.
This is the sort of signal that an alien radar, cellphone etc may possibly radiate. Of course its also the exact type of signal thats generated by the million on earth and tends to swamp the Arecibo data, even though the nearest large radar is a long way away and has been arranged not to radiate toward the telescope. SETI is experimenting with different techniques to supress this RFI.
As we know, pulsed signals sent through a large volume of space filled with gas and dust get dispersed, that is the higher frequency components arrive before lower frequencies. Unlike Einstein, Astropulse scans each workunit with a whole range of de-dispersions.
Thank you for explanation
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Thank you for explanation
RE: SETI looks for certain
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Seti is down most of the time
Einstein is not
Sorry, I couldnt resist!
Einstein does actually find
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Einstein does actually find what it is looking for.
Couldn't resist either.
BM
BM
RE: Einstein does actually
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Which is the reason I give it any resource share at all instead of relegating it to purely backup status. Between the higher likelihood that something will be found and the much smaller user base, I have a much better chance of being the user who finds something. (Even if that something won't get me the worldwide fame finding ET would.)
David
Miserable old git
Patiently waiting for the asteroid with my name on it.