High time resolution gamma‐ray studies of Cygnus X‐1

We report results of our studies of high‐time‐resolution data on Cygnus X‐1 collected by the OSSE instrument in several observations from June, 1991 to June, 1993. Rate samples were collected in several energy bands with a time resolution of 4 milliseconds. Using Fast Fourier Transforms and auto‐correlation functions, we have searched these OSSE data on various timescales for evidence of flares and other time structures, both periodicities and overlapping shots. We describe these searches, present the results, and compare them with previous observations at lower energies.