A photon observed by the SEDA-FIB detector on the arrival of the   gravitational wave
  We reported a photon detection at the arrival time of the gravitational wave on December 26th, 2015. According to the LIGO-Virgo collaboration, the gravitational wave was produced by the merging process of the two black holes. The merged time was determined at 03:38:53.6 UT on December 26th. At 03:38:54.05 GPS time, one of the detectors of SEDA-FIB on board the International Space Station (ISS) detected a photon, arriving from the direction of Corona Australis near the Galactic Bulge (GB). The energy of the photon was about (35+-7) MeV. A 3.0 sigma level detection of the photon is discussed. 
Y. Muraki, K. Kamiya, K. Koga, H. Matsumoto, and S. Shibata
astro-ph.HE astro-ph.IM