On the universal late X-ray emission of binary-driven hypernovae and its
  possible collimation
  It has previously been discovered that there is a universal power law
behavior exhibited by the late X-ray emission (LXRE) of a "golden sample" (GS)
of six long energetic GRBs, when observed in the rest-frame of the source. This
remarkable feature, independent of the different isotropic energy (E_iso) of
each GRB, has been used to estimate the cosmological redshift of some long
GRBs. This analysis is extended here to a new class of 161 long GRBs, all with
E_iso > 10^52 erg. These GRBs are indicated as binary-driven hypernovae (BdHNe)
in view of their progenitors: a tight binary system composed of a carbon-oxygen
core (CO_core) and a neutron star undergoing an induced gravitational collapse
(IGC) to a black hole triggered by the CO_core explosion as a supernova (SN).
We confirm the universal behavior of the LXRE for the "enlarged sample" (ES) of
161 BdHNe observed up to the end of 2015, assuming a double-cone emitting
region. We obtain a distribution of half-opening angles peaking at 17.62
degrees, with a mean value of 30.05 degrees, and a standard deviation of 19.65
degrees. This, in turn, leads to the possible establishment of a new
cosmological candle. Within the IGC model, such universal LXRE behavior is only
indirectly related to the GRB and originates from the SN ejecta, of a standard
constant mass, being shocked by the GRB emission. The fulfillment of the
universal relation in the LXRE and its independence of the prompt emission,
further confirmed in this article, establishes a crucial test for any viable
GRB model.
