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!"

Perhaps LIGO conspirators are carefully studying data collected by INTEGRAL and will soon "discover" gravitational waves produced by a neutron star merger or a supernova explosion the data suggest has happened:

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