Author: Alexei Pozanenko
Abstract: We suggest observational tests which could verify the two-jet model of short duration Gamma-Ray Bursts with an Extended Emission (EE). Among the tests there are investigations of decay part of the EE, afterglow behavior and number density of the ratio of the peak flux of EE and the peak flux of Initial Pulse Complex (IPC). Based on the parameters investigated we can restrict parameters of the two-jet model. We also discuss a possible dichotomy in a population of short GRB.