A Third LIGO Detection of a Black Hole Merger, 3 Billion ly Distant

[origin]

GW pattern was known.
And yes they are investing in 3rd facility, it is expected to come up in India.

But you have raised a good point, no top physicist invested in GW or relativity for that matter, would acknowledge futility of this investment, so future grants would continue.

My prediction is 3rd facility will dump relativity in first detection itself. I will tell you how. It's a very big gamble being taken up by top general relativists.

Recall that the first detection (I don't have data for second and third), detection time gap between two facilities was of the order of 10 ms, matches with GW speed at c, but as soon as third facility gets kicked in, the time stamping will establish if GW speed is c or not. The gamble is GR guys feel it will be c and you know my prediction, it won't be c. 2022 will coincide with supernova event, I think that's the inauguration date for third facility.

If you get a news, that third facility project is being dropped, then get yourself convinced that GR guys are playing safe for few more years.

How absurd. You really believe that it is more important for the scientists to hold on to a current theory than to advance knowledge? You are either trolling or just incredibly out of touch. By the way your prediction, holds about as much weight as a flea turd (don't feel bad, my prediction would be the same weight, we are not physicists - remember?).

 

[The God]

How absurd. You really believe that it is more important for the scientists to hold on to a current theory than to advance knowledge? You are either trolling or just incredibly out of touch. By the way your prediction, holds about as much weight as a flea turd (don't feel bad, my prediction would be the same weight, we are not physicists - remember?).

But that's how it is. It makes sense to hold on to GR till it becomes absolutely absolutely untenable.

Neither I am trolling nor I am incredibly out of touch. Wait and watch.

 

[Q-reeus]

Don't forget that before the first gravity wave was detected, no on had any clue or even a preconception of what a gravity wave looked like, how strong or how weak it would be, or anything else about them.

Huh??!! As already noted by The God, for many decades, probably not long after the inception of GR, there was a very good mathematical idea of what at least low amplitude GW's looked like. Check out any textbook on GR covering the subject e.g. MTW's Gravitation - written in the early 1970's.

Thorne's consultation on the movie 'Interstellar' demonstrates this very well. They wouldn't throw books from shelves, even if the tidal forces from a black hole merger event might, if you were already dangerously close to the pair when they merged.

One day I must watch that fantasy sci-fi flick.

Now because we know what they look like, and know how to detect them, things are much different. Would they really go to the trouble of building a third facility, or putting up satellites if all of this work was a fraud? I for one don't think this is likely.

Whose saying it is a fraud? Simulated detections - faux GW's owing to electronic injections into instruments and/or mirror mounts, would invalidate real detections how?
PS: We still don't know for sure the detected GW's are those of GR. AS covered in previouis threads, experts affiliated with aLIGO, including Thorne, admit radically different G4v remains a viable contender.

 

[danshawen]

One day I must watch that fantasy sci-fi flick.

Me too, I suppose. I just watched that one scene, and that was enough fantasy science for me. Someone evidently thought GWs could be much stronger (larger amplitude) than the ones we have already detected. I don't see how.

If the faux gravity waves are nothing more than mechanical coupling of noise to the mirrors, well that would be just sad. I still don't see how you can do that the first time without knowing what one should look like, or what sensitivity would be required. We really didn't. All we knew for certain was that previous sensitivity upgrades didn't work. There was really no reason to expect they would ever work, other than on paper.

 

[RADII]

Huh??!! As already noted by The God, for many decades, probably not long after the inception of GR, there was a very good mathematical idea of what at least low amplitude GW's looked like. Check out any textbook on GR covering the subject e.g. MTW's Gravitation - written in the early 1970's.

[snip]

Whose saying it is a fraud? Simulated detections - faux GW's owing to electronic injections into instruments and/or mirror mounts, would invalidate real detections how?
PS: We still don't know for sure the detected GW's are those of GR. AS covered in previouis threads, experts affiliated with aLIGO, including Thorne, admit radically different G4v remains a viable contender.

The uncertainty is why they are also trying to validate using timings of pulsars:

"While mergers of SMBHB's are expected to be common emitters of GW radiation, modulating pulsar timing observations have not yet detected any evidence for a GW signal (Arzoumanian et al. 2016). Pulsar timing observations, unlike LIGO, should be more sensitive to SMBHB mergers (Shannon et al. 2015).

0402+379, with a separation of 7.3 pc between its core components, is one of the most important precursors of GW sources, and is important to understand the reason behind the low incidence of such systems. From the elliptical morphology of the 0402+379 host galaxy (Andrade-Santos et al. 2016), we believe this object to be the result of a major merger."

[Constraining the Orbit of Supermassive Black Hole Binary 0402+379 K. Bansal1, G. B. Taylor1, A. B. Peck2, R. T. Zavala3, & R. W. Romani4]