  If the threshold for $e^{-}e^{+}$ pair production depends on an angle between
photon momenta, and if the $\gamma$-rays are collimated right in gamma-ray
burst (GRB) source then another solution of the compactness problem is
possible. The list of basic assumptions of the scenario describing the GRB with
energy release $< 10^{49}$ erg is adduced: the matter is about an alternative
to the ultrarelativistic fireball if all long-duration GRBs are physically
connected with core-collapse supernovae (SNe). The questions about radiation
pressure and how the jet arises on account of even a small radiation field
asymmetry in a compact GRB source of size $\lesssim 10^8$ cm, and observational
consequences of the compact model of GRBs are considered.
