Searching for high-frequency quasiperiodic oscillations in short gamma-ray bursts

Gamma-ray bursts (GRBs) are the most energetic electromagnetic events observed in the universe. Short GRBs (lasting typically less than 2 seconds), have been associated with the merger of binary neutron stars. Searches for periodicity or quasiperiodicity in GRBs are challenging due to the extremely diverse and complex nature of their light curves, but could offer insight on the nature of their progenitors. In order to look for high-frequency quasiperiodic features, we use a Bayesian approach applied to a large sample of archival short gamma ray bursts detected by Fermi/GBM, Swift/BAT and CGRO/BATSE. I will discuss our current results, the limitations of our method, caveats and possible interpretations.