  The exciting development of gravitational wave (GW) astronomy in the
correlation of LIGO and VIRGO detection of GW signals makes possible to expect
registration of effects of not only Binary Black Hole (BH) coalescence, but
also Binary Neutron Star (NS) merging accompanied by electromagnetic (GRB)
signal. Here we consider the possibility that a Neutron Star (NS), merging in a
NS-NS or NS-BH system might be (soon) observed in correlation with any
LIGO-VIRGO Gravitational Waves detection. We analyze as an example the recent
case of the short GRB 170817A observed by Fermi and Integral. The associated
Optical transient OT source in NGC4993 imply a rare near source, a consequent
averaged large rate of such events (almost) compatible with expected NS NS
merging rate. However the expected beamed GRB (or Short GRB) may be mostly
aligned to a different direction than our. Therefore even soft GRB photons,
more spread than hard ones, might be hardly able to shower to us. Nevertheless
a prompt spiraling electron turbine jet in largest magnetic fields, at the base
of the NS-NS collapse, might shine by its tangential synchrotron radiation in
spread way with its skimming photons shining in large open disk. The consequent
solid angle for such soft disk gamma radiation may be large enough to be
nevertheless often observed.
