SONATORE.

Second gravitational wave makes it official: merging black holes don’t burst!

“Yesterday’s announcement showed the world that, at 03:38 UTC on December 26, 2015, a second black hole-black hole merger occurred, between a 14 and an 8 solar mass black hole. Thankfully, the Fermi GBM data set is online and searchable, and you can look yourself for whether any events were triggered in the vicinity of that event. While there were potential events offset by hours on either side, neither X-rays or gamma-rays were seen coincident with GW151226. The satellite designed to monitor exactly those types of signals, the only one that gave a positive result previously, came up empty this time.”