Second Gravitational Wave event confirmed!

In article ,
Yousuf Khan writes:
Great, now I wonder how much of their energy was turned into gravity
waves?

I'm coming back to this late, but the answer is in the paper draft at
https://dcc.ligo.org/LIGO-P1600088/main/public

Table 1 shows total initial mass 21.8 Msun and final mass 20.8 Msun,
but both have uncertainties of more than 1 Msun. However, the
radiated energy is given as 1.0(+0.1/-0.2) Msun, so it seems
reasonably well determined.

By the way, the correct term for what LIGO is looking for is
"gravitational waves." Ordinary water waves on a lake or ocean are
examples of "gravity waves." That name distinguishes them from
"pressure waves" such as sound.

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