Hubble diagrams of soft and hard radiation sources in the graviton   background: to an apparent contradiction between supernova 1a and gamma-ray   burst observations
  In the sea of super-strong interacting gravitons, non-forehead collisions with gravitons deflect photons, and this deflection may differ for soft and hard radiations. As a result, the Hubble diagram would not be a universal function and it will have a different view for such sources as supernovae in visible light and gamma-ray bursts. Observations of these two kinds are compared here with the limit cases of the Hubble diagram. 
Michael A. Ivanov