| Subject: Re: Power up, Frequency high |
| From: red |
| Date: 11/02/2004, 02:39 |
sweet,
There is a graphical plot of the signal for each pulsar, right next to
its' gray button. That is the signal analysis, but only for one pulse,
seen alone. Background radio noise forms the baseline, and the radio
signal rise to a peak, then drops off. Almost as soon as one "pulse" of
radio energy fades, the next one arrives, in a steady chain. Say:
A-A-A-A-A-A-A-A-A-A-A-A-A
very rapidly. :-)
If the pulsar were a lighthouse, imagine the beam sweeping across Earth
again and again, but very rapidly. The pulsar produces focused radio
pulses, not focused beams of light. A radio receiver produces these pulses
as separate clicks; when the clicks are repeated fast enough, we hear them
as a buzz (like the wingbeats of an insect) or even as a steady tone.
--
Cheers,
Red
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sweet wrote:
"red" <read@xmission.com> wrote in message
news:4028844D.2024E85F@xmission.com...
Ciaran,
There -was- one signal, somewhat famous around SETI, that got noted as
WOW! on their printout sheets. It never repeated, so nobody counts the
signal as a "valid" find. If you found that WOW! signal using S@h, it
would look about like this image (almost at the bottom of the page, second
from last):
http://www.planetary.org/html/UPDATES/seti/SETI@home/Update_120301.htm
lotsa other info on their home page, too:
http://www.planetary.org/html/UPDATES/seti/index.html
You can listen to some real, regularly pulsed, strong radio signals,
guaranteed to be of Extra Terrestrial [ET] origin, here (hang on to your
hat!)
http://www.jb.man.ac.uk/~pulsar/Education/Sounds/sounds.html
click each gray button (takes maybe a minute to load & play each different
one) but these signals are -not- sent by ETIs (Extra Terrestrial
Intelligences).
--
Cheers,
Red
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My favorite tune was "PSR J0437-4715." Has anyone done a detailed analysis
of the sound? I'd like to know if they have and what they found.
tia,
-sweet