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Why LIGO Cannot Fake Neutron Star Gravitational Waves



 
 
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  #1  
Old May 30th 16, 05:50 PM posted to sci.astro
Pentcho Valev
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Default Why LIGO Cannot Fake Neutron Star Gravitational Waves

LIGO conspirators have announced no detection of gravitational waves from neutron stars so far, although everybody is/was expecting it:

https://www.researchgate.net/post/Am..._wave_GW150914
Peter Hahn, Northern Alberta Institute of Technology: "Am I the only one that is doubtful of LIGO’s detection of gravitational wave GW150914? [...] Looks like this was a one-time event that could very well be a lucky fluke or a fake. I guess the next step is to patiently wait for the LIGO team to search through the four months of O1 data to see if they can find other sources of gravitational wave signals such as the kind from rapidly rotating neutron stars!"

http://theadvocate.com/news/15893528...ew-discoveries
"After a whirlwind tour of press conferences, parties and awards following their Feb. 11 announcement of the world’s first direct detection of gravitational waves, the team of scientists at the Laser Interferometer Gravitational-Wave Observatory are preparing to begin another round of listening for cosmic collisions. Sometime this fall — likely September or October — the twin detectors in Livingston Parish and Hanford, Washington, will again begin collecting data in the search for signals similar to those detected on Sept. 14 from a 1.3 billion-year-old merger of two black holes. [...] Before the Sept. 14 detection, LIGO scientists had focused their calculations on the mergers of neutron stars, not black holes. That’s because neutron stars — the dense remnants of collapsed stars — had been observed already through other means, like electromagnetic radiation, and were, thus, more predictable, said Joseph Giaime, head of the LIGO Livingston Observatory and a professor of physics and astronomy at LSU."

The explanation is obvious and is suggested by LIGO conspirators themselves in the quotation above: "...neutron stars — the dense remnants of collapsed stars — had been observed already through other means...".. So, while the black hole fake remained unpunished and brought a lot of money to LIGO conspirators, that would not have been the case with a neutron star fake:

http://www.esa.int/Our_Activities/Sp..._bl ack_holes
"Models predict that the merging of two stellar-mass black holes would not produce light at any wavelength, but if one or two neutron stars were involved in the process, then a characteristic signature should be observable across the electromagnetic spectrum. Another possible source of gravitational waves would be an asymmetric supernova explosion, also known to emit light over a range of wavelengths. (...) Integral is sensitive to transient sources of high-energy emission over the whole sky, and thus a team of scientists searched through its data, seeking signs of a sudden burst of hard X-rays or gamma rays that might have been recorded at the same time as the gravitational waves were detected. "We searched through all the available Integral data, but did not find any indication of high-energy emission associated with the LIGO detection," says Volodymyr Savchenko of the François Arago Centre in Paris, France. Volodymyr is the lead author of a paper reporting the results, published today in Astrophysical Journal Letters. (...) Subsequent analysis of the LIGO data has shown that the gravitational waves were produced by a pair of coalescing black holes, each with a mass roughly 30 times that of our Sun, located about 1.3 billion light years away. Scientists do not expect to see any significant emission of light at any wavelength from such events, and thus Integral's null detection is consistent with this scenario. (...) The only exception was the Gamma-Ray Burst Monitor on NASA's Fermi Gamma-Ray Space Telescope, which observed what appears to be a sudden burst of gamma rays about 0.4 seconds after the gravitational waves were detected. The burst lasted about one second and came from a region of the sky that overlaps with the strip identified by LIGO. This detection sparked a bounty of theoretical investigations, proposing possible scenarios in which two merging black holes of stellar mass could indeed have released gamma rays along with the gravitational waves. However, if this gamma-ray flare had had a cosmic origin, either linked to the LIGO gravitational wave source or to any other astrophysical phenomenon in the Universe, it should have been detected by Integral as well. The absence of any such detection by both instruments on Integral suggests that the measurement from Fermi could be unrelated to the gravitational wave detection."

http://www.forbes.com/sites/startswi...m-black-holes/
" How NASA's Fermi Scientists Are (Probably) Fooling Themselves About Gamma Rays From Black Holes (...) And finally, there’s a competing satellite programme — the European Space Agency’s INTEGRAL satellite — that definitively saw no high-energy signal associated with the LIGO event. In a paper published last month in the prestigious Astrophysical Journal Letters, lead author Volodymyr Savchenko concluded the following, “We searched through all the available Integral data, but did not find any indication of high-energy emission associated with the LIGO detection.” "

Pentcho Valev
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  #2  
Old June 3rd 16, 03:08 PM posted to sci.astro
Pentcho Valev
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Posts: 8,078
Default Why LIGO Cannot Fake Neutron Star Gravitational Waves

LIGO conspirators will not "discover" gravitational waves accompanied by light emissions before the Fermi team and the INTEGRAL team take part in the conspiracy. Now the situation is too dangerous - the fraud committed by the Fermi team was so easily exposed:

http://www.forbes.com/sites/startswi...ble-after-all/
"Optical telescopes didn’t see anything, as expected. Merging black holes weren’t anticipated to emit any light, unlike merging stars (which create a larger star), white dwarfs (which create a supernova), or neutron stars (which are thought to create a gamma ray burst); they should only be detectable by their gravitational wave signal. Yet there was a curious possible exception, as a team from NASA’s Fermi satellite claimed to detect gamma rays coincident with this event, offset by a meagre 0.4 seconds. An array of 14 crystal detectors on board — the Gamma-ray Burst detection Monitor (GBM) instrument — detected an unexpected burst of X-rays, and claimed there was only a 0.2% chance of a false positive. While NASA was celebrating, however, cautious scientists all over the world were skeptical. Not only would this overthrow the leading theoretical models for black hole mergers, and not only does a 99.8% chance of success correspond only to a 3-σ significance (rather than the 5-σ significance typically required for a discovery in physics), but a complimentary satellite in orbit — the ESA’s INTEGRAL satellite — failed to see the corroborating evidence it should have if this signal were real. On the contrary, INTEGRAL searched through all the data and failed to find any interesting signal coincident with LIGO’s gravitational wave at all. [...] But in order to make sure we aren’t fooling ourselves, we have to do it right. Collaboration between the teams — the Fermi team, the INTEGRAL team, and the gravitational wave teams — are incredibly important."

Pentcho Valev
  #3  
Old June 15th 16, 07:54 PM posted to sci.astro
Pentcho Valev
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Posts: 8,078
Default Why LIGO Cannot Fake Neutron Star Gravitational Waves

So LIGO conspirators are not going to fake gravitational waves from binary neutron stars, judging from what they said at the press conference (faking black hole gravitational waves brings enough money anyway). The reason why they are so cautious is explained in my postings above.

Pentcho Valev
 




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