  Linking the previous research that occurred over the last decades, I will try
to provide some objective elements to evaluate the innovation of the joint
observation of GW170817 and GRB 170817A and their occurrence detection, in
light of preceding experiences regarding the experimental research of
association between gamma-ray bursts and gravitational waves. Without debating
about the phenomenological properties of astrophysical events, I propose a
comparison between that result and the previous experimental research by the
interferometer GW community, using a fundamental energy emission law, and
including about fifteen years of accredited results regarding coincident
detection. From the present review, an intense and old pre-existing activity in
the field of multimessenger observations emerges giving a first interesting
fact. The widespread opinion that joint detection of GW170817 and GRB 170817A
has opened a new method in astrophysics does not find a robust reason.
Moreover, some critical points highlight. In the past, applying the same
multimessenger method, numerous measures have been taken towards much brighter
and much closer sources. Then, it would have been plausible to see joint
signals even taking into account a worse sensitivity of the instruments of the
time. At current time, there is only one event associated to a subthreshold
GRB, compared to a long list of candidate events that would have been much more
revealing. If these inconsistencies are admissible enough to lead to a claim,
then the question arises about the interpretation of the long previous
measurements carried out applying the same multimessenger observation method
but without positive responses.
