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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" 1533 laughin 11-Feb-16 16:34
Re: gravity waves "detected" 549 Susan Doris 11-Feb-16 17:44
Re: gravity waves "detected" 441 Sirius7237 11-Feb-16 18:30
Re: gravity waves "detected" 544 laughin 11-Feb-16 21:20
Re: gravity waves "detected" 460 JonnyMcA 12-Feb-16 14:23
Re: gravity waves "detected" 501 laughin 12-Feb-16 15:51
Re: gravity waves "detected" 346 JonnyMcA 12-Feb-16 16:31
Re: gravity waves "detected" 450 laughin 13-Feb-16 18:26
Re: gravity waves "detected" 498 JonnyMcA 13-Feb-16 18:41
Re: gravity waves "detected" 561 Me 15-Feb-16 15:57
Re: gravity waves "detected" 417 laughin 15-Feb-16 20:17
Re: gravity waves "detected" 454 carolb 13-Feb-16 21:53
Re: gravity waves "detected" 349 D-Archer 14-Feb-16 11:16
Re: gravity waves "detected" 364 carolb 14-Feb-16 14:54
Re: gravity waves "detected" 364 Sirius7237 14-Feb-16 20:08
Re: gravity waves "detected" 464 carolb 14-Feb-16 22:31
Re: gravity waves "detected" 477 Aine 15-Feb-16 16:20
Re: gravity waves "detected" 400 D-Archer 15-Feb-16 09:59
Re: gravity waves "detected" 379 JonnyMcA 12-Feb-16 14:31
Re: gravity waves "detected" 419 carolb 13-Feb-16 21:29
Re: gravity waves "detected" 331 laughin 14-Feb-16 15:19
Re: gravity waves "detected" 268 skakos 15-Feb-16 14:07
Re: gravity waves "detected" 364 Pete Vanderzwet 11-Feb-16 21:06
Re: gravity waves "detected" 483 JonnyMcA 12-Feb-16 14:38
Onto Dark Energy waves! 425 Eddie Larry 11-Feb-16 21:34
It took 100 years to discover what Einstein already knew 280 David L 12-Feb-16 12:50
Re: It took 100 years to discover what Einstein already knew 371 Spiros 12-Feb-16 17:09
Re: It took 100 years to discover what Einstein already knew 434 D-Archer 15-Feb-16 12:47
Re: It took 100 years to discover what Einstein already knew 443 Aine 15-Feb-16 16:15
Re: It took 100 years to discover what Einstein already knew 396 D-Archer 15-Feb-16 18:53
Re: It took 100 years to discover what Einstein already knew 415 laughin 15-Feb-16 20:39
Re: It took 100 years to discover what Einstein already knew 352 Aine 16-Feb-16 01:48
Re: gravity waves "detected" 482 dong 12-Feb-16 18:36
Re: gravity waves "detected" 477 laughin 13-Feb-16 03:26
Re: gravity waves "detected" 397 dong 16-Feb-16 07:41
Liego 394 laughin 15-Feb-16 04:17
Gravity Waves of Propaganda the Sequel 382 D-Archer 15-Feb-16 09:48
Re: gravity waves "detected" 465 skakos 15-Feb-16 12:58
Re: gravity waves "detected" 433 Aine 15-Feb-16 22:31
Re: gravity waves "detected" 302 carolb 16-Feb-16 00:57
Re: gravity waves "detected" 377 D-Archer 16-Feb-16 11:47
Re: gravity waves "detected" 517 carolb 16-Feb-16 12:32
Re: gravity waves "detected" 335 D-Archer 16-Feb-16 14:13
Re: gravity waves "detected" 350 carolb 16-Feb-16 14:42
Re: gravity waves "detected" 324 D-Archer 16-Feb-16 15:17
Re: gravity waves "detected" 450 carolb 16-Feb-16 16:27
Re: gravity waves "detected" 462 D-Archer 17-Feb-16 14:08
Really? 352 Sirfiroth 17-Feb-16 15:11
Re: Really? 459 JonnyMcA 17-Feb-16 15:32
Re: Really? 446 D-Archer 17-Feb-16 15:42
Re: gravity waves "detected" 451 carolb 17-Feb-16 18:05
mods! 404 D-Archer 18-Feb-16 11:13
Re: mods! 486 carolb 18-Feb-16 14:14
Re: mods! 484 D-Archer 18-Feb-16 16:02
Re: gravity waves "detected" 563 Sirfiroth 17-Feb-16 01:06
Re: gravity waves "detected" 385 Aine 17-Feb-16 14:48
Re: gravity waves "detected" 427 JonnyMcA 17-Feb-16 15:19
Re: gravity waves "detected" 315 Sirfiroth 17-Feb-16 15:39
Re: gravity waves "detected" 392 JonnyMcA 17-Feb-16 17:37
Re: gravity waves "detected" 480 Aine 17-Feb-16 18:49
Re: gravity waves "detected" 426 laughin 16-Feb-16 20:24
Re: gravity waves "detected" 273 D-Archer 17-Feb-16 16:23
Gravy Waves 586 D-Archer 20-Feb-16 11:39
Playing devil’s advocate on the discovery of gravitational waves 530 laughin 02-Mar-16 18:23
Scientists: we're 100% convinced 357 laughin 07-Mar-16 17:13
Black holes and big bangs can't co-exist 458 laughin 13-Mar-16 04:52
Re: gravity waves "detected" 393 brett z 20-Apr-16 23:42
Re: gravity waves "detected" 401 laughin 21-Apr-16 14:02
Re: gravity waves "detected" 313 OCaptain 10-May-16 12:45
Re: gravity waves "detected" 269 laughin 10-May-16 13:16
Re: gravity waves "detected" 339 OCaptain 10-May-16 13:21
Re: gravity waves "detected" 382 laughin 10-May-16 19:25
Re: gravity waves "detected" 496 OCaptain 10-May-16 22:56
Re: gravity waves "detected" 398 laughin 11-May-16 15:32
Re: gravity waves "detected" 494 JonnyMcA 11-May-16 16:53
Re: gravity waves "detected" 495 laughin 12-May-16 16:26
pompousness "detected" 429 laughin 18-May-16 15:25
bump- 2 weeks 534 laughin 27-May-16 15:02
Re: bump- 3 weeks 470 laughin 02-Jun-16 23:20
Re: bump- 4 weeks and why isn't Carolb patrolling the threads 468 laughin 10-Jun-16 15:42
Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 450 laughin 04-May-16 13:15
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 456 D-Archer 09-May-16 19:05
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 273 OCaptain 10-May-16 12:46
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 487 laughin 10-May-16 13:27
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 329 OCaptain 10-May-16 16:39
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 383 laughin 10-May-16 19:10
how many times can you change the rules and still get a black hole 374 laughin 08-Jun-16 14:00
LIGO press conf, June 15 417 brett z 15-Jun-16 11:53
Re: LIGO press conf, June 15 401 D-Archer 15-Jun-16 14:48


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