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Old December 8th 18, 03:12 PM posted to sci.astro
Thomas 'PointedEars' Lahn
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Default LIGO's Neutron-Star-Merger Event: Fake More Than Obvious

Pentcho Valev wrote:
"On 8:41 am EDT August 17, 2017, LIGO detected a new gravitational wave source, dubbed GW170817 to mark its discovery date. Just two seconds later NASA's Fermi satellite detected a weak pulse of gamma rays from the same location of the sky." https://www.cfa.harvard.edu/news/2017-30

"The same location" is an Achilles' heel.


Nonsense. To begin with, they do not state *there* how much the position of
the Fermi source coincided with the GW source (this can probably be found in
the paper – which you did not read, did you?). In fact, it stands to reason
that the precision of the GW source’s location is not a good as Fermi’s.

See also: https://www.ligo.caltech.edu/image/ligo20171016b

Note that there is a considerable *area* marked on the celestial sphere, NOT
a single point.

Gamma rays undergo gravitational deflection […]


By what, in this case?

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