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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" 1476 laughin 11-Feb-16 16:34
Re: gravity waves "detected" 507 Susan Doris 11-Feb-16 17:44
Re: gravity waves "detected" 397 Sirius7237 11-Feb-16 18:30
Re: gravity waves "detected" 497 laughin 11-Feb-16 21:20
Re: gravity waves "detected" 415 JonnyMcA 12-Feb-16 14:23
Re: gravity waves "detected" 458 laughin 12-Feb-16 15:51
Re: gravity waves "detected" 296 JonnyMcA 12-Feb-16 16:31
Re: gravity waves "detected" 406 laughin 13-Feb-16 18:26
Re: gravity waves "detected" 450 JonnyMcA 13-Feb-16 18:41
Re: gravity waves "detected" 514 Me 15-Feb-16 15:57
Re: gravity waves "detected" 370 laughin 15-Feb-16 20:17
Re: gravity waves "detected" 412 carolb 13-Feb-16 21:53
Re: gravity waves "detected" 306 D-Archer 14-Feb-16 11:16
Re: gravity waves "detected" 333 carolb 14-Feb-16 14:54
Re: gravity waves "detected" 318 Sirius7237 14-Feb-16 20:08
Re: gravity waves "detected" 427 carolb 14-Feb-16 22:31
Re: gravity waves "detected" 438 Aine 15-Feb-16 16:20
Re: gravity waves "detected" 364 D-Archer 15-Feb-16 09:59
Re: gravity waves "detected" 334 JonnyMcA 12-Feb-16 14:31
Re: gravity waves "detected" 380 carolb 13-Feb-16 21:29
Re: gravity waves "detected" 300 laughin 14-Feb-16 15:19
Re: gravity waves "detected" 228 skakos 15-Feb-16 14:07
Re: gravity waves "detected" 328 Pete Vanderzwet 11-Feb-16 21:06
Re: gravity waves "detected" 442 JonnyMcA 12-Feb-16 14:38
Onto Dark Energy waves! 391 Eddie Larry 11-Feb-16 21:34
It took 100 years to discover what Einstein already knew 241 David L 12-Feb-16 12:50
Re: It took 100 years to discover what Einstein already knew 336 Spiros 12-Feb-16 17:09
Re: It took 100 years to discover what Einstein already knew 400 D-Archer 15-Feb-16 12:47
Re: It took 100 years to discover what Einstein already knew 403 Aine 15-Feb-16 16:15
Re: It took 100 years to discover what Einstein already knew 359 D-Archer 15-Feb-16 18:53
Re: It took 100 years to discover what Einstein already knew 377 laughin 15-Feb-16 20:39
Re: It took 100 years to discover what Einstein already knew 319 Aine 16-Feb-16 01:48
Re: gravity waves "detected" 450 dong 12-Feb-16 18:36
Re: gravity waves "detected" 423 laughin 13-Feb-16 03:26
Re: gravity waves "detected" 351 dong 16-Feb-16 07:41
Liego 355 laughin 15-Feb-16 04:17
Gravity Waves of Propaganda the Sequel 333 D-Archer 15-Feb-16 09:48
Re: gravity waves "detected" 432 skakos 15-Feb-16 12:58
Re: gravity waves "detected" 390 Aine 15-Feb-16 22:31
Re: gravity waves "detected" 252 carolb 16-Feb-16 00:57
Re: gravity waves "detected" 341 D-Archer 16-Feb-16 11:47
Re: gravity waves "detected" 462 carolb 16-Feb-16 12:32
Re: gravity waves "detected" 294 D-Archer 16-Feb-16 14:13
Re: gravity waves "detected" 310 carolb 16-Feb-16 14:42
Re: gravity waves "detected" 289 D-Archer 16-Feb-16 15:17
Re: gravity waves "detected" 400 carolb 16-Feb-16 16:27
Re: gravity waves "detected" 417 D-Archer 17-Feb-16 14:08
Really? 309 Sirfiroth 17-Feb-16 15:11
Re: Really? 415 JonnyMcA 17-Feb-16 15:32
Re: Really? 398 D-Archer 17-Feb-16 15:42
Re: gravity waves "detected" 416 carolb 17-Feb-16 18:05
mods! 364 D-Archer 18-Feb-16 11:13
Re: mods! 448 carolb 18-Feb-16 14:14
Re: mods! 429 D-Archer 18-Feb-16 16:02
Re: gravity waves "detected" 530 Sirfiroth 17-Feb-16 01:06
Re: gravity waves "detected" 351 Aine 17-Feb-16 14:48
Re: gravity waves "detected" 386 JonnyMcA 17-Feb-16 15:19
Re: gravity waves "detected" 277 Sirfiroth 17-Feb-16 15:39
Re: gravity waves "detected" 340 JonnyMcA 17-Feb-16 17:37
Re: gravity waves "detected" 437 Aine 17-Feb-16 18:49
Re: gravity waves "detected" 386 laughin 16-Feb-16 20:24
Re: gravity waves "detected" 229 D-Archer 17-Feb-16 16:23
Gravy Waves 542 D-Archer 20-Feb-16 11:39
Playing devil’s advocate on the discovery of gravitational waves 491 laughin 02-Mar-16 18:23
Scientists: we're 100% convinced 315 laughin 07-Mar-16 17:13
Black holes and big bangs can't co-exist 424 laughin 13-Mar-16 04:52
Re: gravity waves "detected" 355 brett z 20-Apr-16 23:42
Re: gravity waves "detected" 360 laughin 21-Apr-16 14:02
Re: gravity waves "detected" 270 OCaptain 10-May-16 12:45
Re: gravity waves "detected" 224 laughin 10-May-16 13:16
Re: gravity waves "detected" 287 OCaptain 10-May-16 13:21
Re: gravity waves "detected" 341 laughin 10-May-16 19:25
Re: gravity waves "detected" 465 OCaptain 10-May-16 22:56
Re: gravity waves "detected" 348 laughin 11-May-16 15:32
Re: gravity waves "detected" 442 JonnyMcA 11-May-16 16:53
Re: gravity waves "detected" 453 laughin 12-May-16 16:26
pompousness "detected" 390 laughin 18-May-16 15:25
bump- 2 weeks 485 laughin 27-May-16 15:02
Re: bump- 3 weeks 421 laughin 02-Jun-16 23:20
Re: bump- 4 weeks and why isn't Carolb patrolling the threads 432 laughin 10-Jun-16 15:42
Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 408 laughin 04-May-16 13:15
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 426 D-Archer 09-May-16 19:05
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 231 OCaptain 10-May-16 12:46
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 446 laughin 10-May-16 13:27
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 294 OCaptain 10-May-16 16:39
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 346 laughin 10-May-16 19:10
how many times can you change the rules and still get a black hole 330 laughin 08-Jun-16 14:00
LIGO press conf, June 15 360 brett z 15-Jun-16 11:53
Re: LIGO press conf, June 15 357 D-Archer 15-Jun-16 14:48


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