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Quote

First black-hole signals
James Hough from the University of Glasgow in the UK agrees with Stuver, pointing out that LIGO’s discovery is also the only direct evidence we have for the existence of any black holes. Astronomers had previously obtained only indirect evidence in the form of X-rays from matter falling into other black holes and the distortion of the orbits of stars at galactic centres that host supermassive black holes.
Hough says the team can be sure that the waves in the GW150914 event came from two merging stellar-mass black holes because the waves are directly related to the size of the system. The radius of the objects is such that they must be black holes for the mass that they have, he explains. “I think that there is no doubt about that at all.”
He adds that the signal from GW150914 was so perfect and clear that it almost needed no sophisticated data analysis to tease it out of LIGO’s data. The signal lasted in the detector for nearly 0.2 s, sweeping from about 30 Hz to 150 Hz, almost exactly as was expected for such a wave.
Matching the templates
According to Stuver, LIGO has a large “template bank” containing detailed simulations and predictions for every possible type of merger – be it binary black holes or neutron stars – with many different permutations and combinations of possible masses. Each template produces a unique gravitational-wave signal and the researchers’ computer system actively looks for a high correlation between it and an incoming signal. If the two are close, a detection is flagged. For GW150914, this correlation was extremely clear and immediately noticeable.

now having experience dealing with big science -global warming
this should , at least, make one stop and say "wait a minute"

a event that happened a billion years ago
just so happened to float by right after
LIGO was "upgraded"...........
a few days earlier and we'd a missed it
and some thought "coincidences" only happened on GT&P

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Subject Views Written By Posted
gravity waves "detected" 1526 laughin 11-Feb-16 16:34
Re: gravity waves "detected" 543 Susan Doris 11-Feb-16 17:44
Re: gravity waves "detected" 435 Sirius7237 11-Feb-16 18:30
Re: gravity waves "detected" 538 laughin 11-Feb-16 21:20
Re: gravity waves "detected" 454 JonnyMcA 12-Feb-16 14:23
Re: gravity waves "detected" 495 laughin 12-Feb-16 15:51
Re: gravity waves "detected" 340 JonnyMcA 12-Feb-16 16:31
Re: gravity waves "detected" 444 laughin 13-Feb-16 18:26
Re: gravity waves "detected" 493 JonnyMcA 13-Feb-16 18:41
Re: gravity waves "detected" 552 Me 15-Feb-16 15:57
Re: gravity waves "detected" 410 laughin 15-Feb-16 20:17
Re: gravity waves "detected" 446 carolb 13-Feb-16 21:53
Re: gravity waves "detected" 342 D-Archer 14-Feb-16 11:16
Re: gravity waves "detected" 358 carolb 14-Feb-16 14:54
Re: gravity waves "detected" 356 Sirius7237 14-Feb-16 20:08
Re: gravity waves "detected" 459 carolb 14-Feb-16 22:31
Re: gravity waves "detected" 470 Aine 15-Feb-16 16:20
Re: gravity waves "detected" 396 D-Archer 15-Feb-16 09:59
Re: gravity waves "detected" 373 JonnyMcA 12-Feb-16 14:31
Re: gravity waves "detected" 412 carolb 13-Feb-16 21:29
Re: gravity waves "detected" 326 laughin 14-Feb-16 15:19
Re: gravity waves "detected" 262 skakos 15-Feb-16 14:07
Re: gravity waves "detected" 357 Pete Vanderzwet 11-Feb-16 21:06
Re: gravity waves "detected" 477 JonnyMcA 12-Feb-16 14:38
Onto Dark Energy waves! 419 Eddie Larry 11-Feb-16 21:34
It took 100 years to discover what Einstein already knew 277 David L 12-Feb-16 12:50
Re: It took 100 years to discover what Einstein already knew 366 Spiros 12-Feb-16 17:09
Re: It took 100 years to discover what Einstein already knew 429 D-Archer 15-Feb-16 12:47
Re: It took 100 years to discover what Einstein already knew 436 Aine 15-Feb-16 16:15
Re: It took 100 years to discover what Einstein already knew 390 D-Archer 15-Feb-16 18:53
Re: It took 100 years to discover what Einstein already knew 408 laughin 15-Feb-16 20:39
Re: It took 100 years to discover what Einstein already knew 346 Aine 16-Feb-16 01:48
Re: gravity waves "detected" 477 dong 12-Feb-16 18:36
Re: gravity waves "detected" 470 laughin 13-Feb-16 03:26
Re: gravity waves "detected" 391 dong 16-Feb-16 07:41
Liego 389 laughin 15-Feb-16 04:17
Gravity Waves of Propaganda the Sequel 374 D-Archer 15-Feb-16 09:48
Re: gravity waves "detected" 460 skakos 15-Feb-16 12:58
Re: gravity waves "detected" 428 Aine 15-Feb-16 22:31
Re: gravity waves "detected" 296 carolb 16-Feb-16 00:57
Re: gravity waves "detected" 371 D-Archer 16-Feb-16 11:47
Re: gravity waves "detected" 511 carolb 16-Feb-16 12:32
Re: gravity waves "detected" 329 D-Archer 16-Feb-16 14:13
Re: gravity waves "detected" 346 carolb 16-Feb-16 14:42
Re: gravity waves "detected" 320 D-Archer 16-Feb-16 15:17
Re: gravity waves "detected" 445 carolb 16-Feb-16 16:27
Re: gravity waves "detected" 455 D-Archer 17-Feb-16 14:08
Really? 346 Sirfiroth 17-Feb-16 15:11
Re: Really? 452 JonnyMcA 17-Feb-16 15:32
Re: Really? 440 D-Archer 17-Feb-16 15:42
Re: gravity waves "detected" 446 carolb 17-Feb-16 18:05
mods! 397 D-Archer 18-Feb-16 11:13
Re: mods! 480 carolb 18-Feb-16 14:14
Re: mods! 478 D-Archer 18-Feb-16 16:02
Re: gravity waves "detected" 557 Sirfiroth 17-Feb-16 01:06
Re: gravity waves "detected" 379 Aine 17-Feb-16 14:48
Re: gravity waves "detected" 421 JonnyMcA 17-Feb-16 15:19
Re: gravity waves "detected" 309 Sirfiroth 17-Feb-16 15:39
Re: gravity waves "detected" 386 JonnyMcA 17-Feb-16 17:37
Re: gravity waves "detected" 476 Aine 17-Feb-16 18:49
Re: gravity waves "detected" 418 laughin 16-Feb-16 20:24
Re: gravity waves "detected" 266 D-Archer 17-Feb-16 16:23
Gravy Waves 580 D-Archer 20-Feb-16 11:39
Playing devil’s advocate on the discovery of gravitational waves 523 laughin 02-Mar-16 18:23
Scientists: we're 100% convinced 350 laughin 07-Mar-16 17:13
Black holes and big bangs can't co-exist 450 laughin 13-Mar-16 04:52
Re: gravity waves "detected" 389 brett z 20-Apr-16 23:42
Re: gravity waves "detected" 397 laughin 21-Apr-16 14:02
Re: gravity waves "detected" 309 OCaptain 10-May-16 12:45
Re: gravity waves "detected" 258 laughin 10-May-16 13:16
Re: gravity waves "detected" 331 OCaptain 10-May-16 13:21
Re: gravity waves "detected" 377 laughin 10-May-16 19:25
Re: gravity waves "detected" 492 OCaptain 10-May-16 22:56
Re: gravity waves "detected" 392 laughin 11-May-16 15:32
Re: gravity waves "detected" 488 JonnyMcA 11-May-16 16:53
Re: gravity waves "detected" 491 laughin 12-May-16 16:26
pompousness "detected" 423 laughin 18-May-16 15:25
bump- 2 weeks 529 laughin 27-May-16 15:02
Re: bump- 3 weeks 463 laughin 02-Jun-16 23:20
Re: bump- 4 weeks and why isn't Carolb patrolling the threads 461 laughin 10-Jun-16 15:42
Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 443 laughin 04-May-16 13:15
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 453 D-Archer 09-May-16 19:05
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 268 OCaptain 10-May-16 12:46
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 479 laughin 10-May-16 13:27
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 322 OCaptain 10-May-16 16:39
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 379 laughin 10-May-16 19:10
how many times can you change the rules and still get a black hole 368 laughin 08-Jun-16 14:00
LIGO press conf, June 15 410 brett z 15-Jun-16 11:53
Re: LIGO press conf, June 15 396 D-Archer 15-Jun-16 14:48


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