  Motivated by the recent diphoton excess reported by both the ATLAS and CMS
collaborations, we provide a model-independent combination of diphoton results
obtained at $\sqrt{s}=8$ and 13 TeV at the LHC. We consider resonant s-channel
production of a spin-0 and spin-2 particle with a mass of 750 GeV that
subsequently decays to two photons. The size of the excess reported by ATLAS
appears to be in slight tension with other measurements under the spin-2
particle hypothesis.
