Background Referring to this article on Fermi EM signal, 0.4 s after the gravitational wave detection by LIGO, FERMI detected an electromagnetic signal (poorly localized) with a false alarm probability of 0.0022.
Question I wanted to ask what the status of this discovery is currently. I heard some theorists have started debating. There seems to be a small consensus that the EM signal is not a counterpart for the gravitational waves? Or is it simply too early to start making conclusions, since we do not know if the EM radiation is from the same source or not?
My confusion This is somewhat hard for me to understand though. Since sub-parsec scales are not really resolved anyway, why would there be no possibility of there being matter circling the two black holes, which upon black hole merging annihilates away as a result of high energy particle collisions?