Comments on Graviton Propagation in Light of GW150914

Abstract

The observation of gravitational waves from the Laser Interferometer Gravitational-Wave Observatory (LIGO) event GW150914 may be used to constrain the possibility of Lorentz violation in graviton propagation, and the observation by the Fermi Gamma-Ray Burst Monitor of a transient source in apparent coincidence may be used to constrain the difference between the velocities of light and gravitational waves: $c_g-c_{\gamma }<10^{-17}$.

Comments: 9 pages, no figures; v2 contains additional description and a Noted Added about constraints from GW151226