In the paper Advanced LIGO they published some figures with chances. I would like to know how they know that there's a 90% chance for something to be in a specific value.(adsbygoogle = window.adsbygoogle || []).push({});

https://dcc.ligo.org/public/0122/P1500218/014/PhysRevLett.116.241102.pdf

paper here

also have some other questions:

What is a quadruple moment? (not too much terminology please)

How can you derive that from the formula, that if the chirp mass = 30 solarmasses that m1+m2 = 70 solarmasses ? (it says this in the paper with the formula for the chirp mass)

Due to what are the following noises created?

Quantum noise

Test mass thermal noise

Suspension thermal noise

Gravity gradients

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# B Need an explanation for the chances in this graph

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