Detection of neutron star gravitational waves is far more likely than detection of black hole gravitational waves and yet LIGO conspirators haven't reported even weak and inconclusive signals (which could be compared with Integral's data and become valid evidence in the end). The reason is that faking black hole waves is safe and profitable while faking neutron star waves is dangerous - Integral may expose the fraud:
"What surprised the LIGO collaboration instead was the nature of what they'd detected. Of the various gravitational-wave-producers that LIGO might observe - the kind that disturb space-time to such an extent that LIGO could register the aftershock - the collision of binary black holes was perhaps the least likely. Supernovae, neutron stars, colliding neutron stars: These were what the LIGO collaboration foresaw as far more common candidates. And now LIGO has detected a second pair of colliding black holes."
http://www.lastwordonnothing.com/201...m-wow-to-yawn/
"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."
http://www.theadvocate.com/baton_rou...b95e97f09.html
"Advanced LIGO is likely to observe mergers of double neutron star (NS/NS) binaries at a rate of a few to a few hundred per year; and black-hole/neutron-star (BH/NS) binaries perhaps in a comparable range of rates." Benjamin J. Owen Pennsylvania State University, Endorsed by: David H. Reitze (University of Florida), Stanley E. Whitcomb (LIGO-Caltech)
http://www8.nationalacademies.org/ss...ay.aspx?id=146
"Just over a year ago, LIGO detected its first gravitational-wave signal: GW150914, produced when two black holes merged. While we didn't expect to see any sort of light-based signal from this merger, we could expect to see transient electromagnetic signatures in the case of a neutron star-black hole merger or a neutron star-neutron star merger - in the form of a kilonova or a short gamma-ray burst. While we haven't yet detected any mergers involving neutron stars, LIGO has the sensitivity to make these detections..."
http://aasnova.org/2016/10/26/narrow...ve-detections/
Pentcho Valev