Theoretically, gravitational waves occur constantly they are just far too small for us to ever be able to reasonably detect. It requires a tremendous (understatement) amount of released energy to generate a large enough "wave" for our current instruments to detect. The main contributor to the wave was most likely the acceleration of matter that occurred. The smaller star's matter was estimated to have been accelerated to nearly .3c and the larger to .15c at the moment of collision.
Mirror, Mirror, On the Wall: Who is the Best Mirage Man of Them All? - Pilkington reviews his association with the UFO community over the years, including his personal association of silvery, reflective spheres in Yosemite National Park in mid-July, 1995.Thursday, July 5 2018