"How Uncertain Are LIGO's First Gravitational Wave Detections? The ripples were so powerful, they stretched and compressed the entire Earth by the width of a few atoms, allowing the LIGO apparatus to directly detect gravitational waves for the first time. This confirmed Einstein's General Relativity in an entirely new way, but a new study has cast doubt on whether the detection is as robust as the LIGO team claims it is. Despite a detailed response from a member of the LIGO collaboration, doubts remain... [...] The source of the recent controversy is that a group from Denmark has taken LIGO's public data, their public procedure, and executed it for themselves. But when they analyzed the removed noise, they found that there were correlations between the noise found in the two detectors, which shouldn't be the case! Noise is supposed to be random, and so if the noise is correlated, there's a danger that what you're calling your extracted signal may actually be contaminated by noise."
https://www.forbes.com/sites/startsw...ve-detections/
My comment in Forbes:
Both signal and noise are fake, so noise correlations have the same origin as signal correlations.
"On September 16, 2010, a false signal - a so-called "blind injection" - was fed into both the Ligo and Virgo systems as part of an exercise to "test .... detection capabilities". [...] But take a look at the visualisation of the faked signal, says Dr Kiriushcheva, and compare it to the image apparently showing the collision of the twin black holes, seen on the second page of the recently-published discovery paper. "They look very, very similar," she says. "It means that they knew exactly what they wanted to get and this is suspicious for us: when you know what you want to get from science, usually you can get it." The apparent similarity is more curious because the faked event purported to show not a collision between two black holes, but the gravitational waves created by a neutron star spiralling into a black hole. The signals appear so similar, in fact, that Dr Kiriushcheva questions whether the "true" signal might actually have been an echo of the fake, "stored in the computer system from when they turned off the equipment five years before"."
http://www.thenational.ae/arts-life/...s-collide#full
Pentcho Valev