W/r to the recent announcement of gravitational wave detection, since the signal to noise ration appears to be about 3 to 1 (not really very good) and there is no collaborating evidence from neutrino detection, why are people so certain that a gravitational wave was actually detected?


closed as off-topic by John Rennie, Brandon Enright, Kyle Kanos, Sebastian Riese, HDE 226868 Feb 20 '16 at 20:18

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    $\begingroup$ We wouldn't expect neutrino detection in the case of a black hole merger. Plus two different detectors measured essentially the same signal shifted by a few ms. The signal to noise ratio doesn't have to be that good when you have two detectors. $\endgroup$ – Brandon Enright Feb 20 '16 at 20:09
  • $\begingroup$ Since when is it wild speculation to ask about S/N ratio? I have also read that neutrinos are expected from BH mergers. $\endgroup$ – Mike Smith Feb 20 '16 at 20:25
  • $\begingroup$ By the way I have a Ph.D. How can you possible judge that a person's knowledge of physics from a single question? $\endgroup$ – Mike Smith Feb 20 '16 at 20:27
  • $\begingroup$ I just checked arXiv, since year 2000 about 73 article listed w/r to neutrino release from large body mergers. Some black holes, some neutron stars, some... $\endgroup$ – Mike Smith Feb 20 '16 at 20:35
  • $\begingroup$ I can't find a single paper discussing neutrino release in a black hole - black hole merger. I'm interested in that theorized mechanism so a link would be nice. $\endgroup$ – Brandon Enright Feb 20 '16 at 20:56

According to this paper the significance level was 5.1 sigma, which was good enough to claim a discovery by most scientific standards.


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