Hal Murray wrote:
How about the crab supernova.
Msec pulsars are much more stable - see http://arxiv.org/pdf/0911.5534 for
some comparisons.
You get frequency from pulsars. I think you need something like a
(super)nova to establish a start-time so you can convert frequency to time
relative to that event.
These pulsars have different rates. Could one use the relative timing
of two or three pulsars? that is, T=0 is when pulsar A, B, and C are
coincident. (or is the "beat rate" between them too high to be useful)
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