Black holes of intermediate masses in globular clusters: constraints on
  a spin of a black hole
  In this paper we determined values of a spin of central black holes of the
intermediate masses in globular clusters. For determination of value of a spin
we used the known relation between the kinetic power of the relativistic jet
and observable radio-luminosity of the region near to a central black hole, and
our estimates have based on the known Blandford-Znajek mechanism. The value of
a magnetic field strength near the event horizon of a black hole was derived
via magnetic coupling mechanism. Accretion rate was derived using Bondi-Hoyle
mechanism.
