[time-nuts] How good is your ADEV at 10E7 seconds? :)

Hal Murray hmurray at megapathdsl.net
Fri Nov 17 20:54:51 EST 2017

Context is the what-next portion of a recent LIGO talk.  For those of you 
that missed it (or didn't pay enough attention), on Aug 17th, they got good 
data from a pair of neutron stars.  1.7 seconds later, the Fermi satellite 
got a gamma ray burst.  Within a day, the optical guys had found a new spot.  
Over the next days and weeks, they got data over the whole spectrum, radio to 
X-rays.  (There were 70 observatories lined up to pounce.  Everybody wanted 
in on the action.)

LIGO only works for roughly the audio spectrum.  At the low and high ends, 
the noise goes up.  Lots of people are working on how to build gear that will 
work at other wavelengths.

One proposal is to monitor pulsars.  There might be stuff leftover from the 
big bang with a period of a year or so.  If you can get good timing from a 
pulsar, you might be able to see it.  I suspect that will take "good" timing 
to a scale that would astonish most time-nuts.

These are my opinions.  I hate spam.

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