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Message: <blockquote data-quote="freyar" data-source="post: 6823877" data-attributes="member: 40227"><p>Coming back to the idea of matching the gravitational wave events to other observations: there are lots of papers today where other experimental collaborations looked for corresponding events.  Most of them saw nothing, but the Fermi gamma ray telescope reports a dim, brief event that showed up 0.4 seconds after the gravitational waves. (They estimate about a 0.2% chance that it's just an instrumental artifact.) It's not exactly expected that a black hole merger would be accompanied by a gamma ray burst like this, but I could see that matter falling into the black holes at the time of the merger could light up a bit (the gravitational waves carry out 100x as much energy as the gamma rays, it looks like).  So, it's hard to know if this is real, but it would at least partially solve the mystery of what gamma ray bursts are if this holds up.</p></blockquote><p></p>