Properties of Long Gamma Ray Burst Progenitors in Cosmological
  Simulations
  We study the nature of long gamma ray burst (LGRB) progenitors using
cosmological simulations of structure formation and galactic evolution. LGRBs
are potentially excellent tracers of stellar evolution in the early universe.
We developed a Monte Carlo numerical code which generates LGRBs coupled to
cosmological simulations. The simulations allows us to follow the ormation of
galaxies self-consistently. We model the detectability of LGRBs and their host
galaxies in order to compare results with observational data obtained by
high-energy satellites. Our code also includes stochastic effects in the
observed rate of LGRBs.
