Hi Paul,
I believe the detectors were built specifically to detect gravity waves
generally, not specifically colliding black holes. The detectors took about
half a century to build and debug! When the scientists initially fired up
the two detectors, they were still in a test and calibration mode to verify
everything was working properly. They expected that gravity waves would be
so weak they'd have to do lots of statistical averaging to extract them from
the noise. But then, this huge chirp came in on one detector, and then seven
milliseconds later it arrived at the second detector. The waveforms of the
two signals were identical, and they were so strong you can hear the chirp
over a loudspeaker. For the scientists and engineers who had devoted their
entire careers to this one experiment, it was an enormously emotional
moment.
73,
Jim W8ZR
> -----Original Message-----
> From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Paul
Christensen
> Sent: Monday, November 21, 2016 09:12 AM
> To: amps@contesting.com
> Subject: Re: [Amps] "Conventional" current flow
>
> >"The recordings of the chirp waveform are also in complete agreement
> >with
> general relativity predictions about black holes. By the way, these
detectors are huge objects
> several Km across and cost more than a billion dollars."
>
> Jim,
>
> I've not yet read the information in the link you provided but it should
make for good
> Thanksgiving holiday reading material. Question: were the detectors
constructed for the
> purpose of observing and measuring the collision of two black holes, or is
it a part of larger-
> scale research and the collision is one of many events expected to be
discovered by the
> custom detectors?
>
> Paul, W9AC
>
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