  The LIGO/Virgo Consortium (LVC) released a preliminary announcement of a
candidate gravitational wave signal, S190426c, that could have arisen from a
black hole-neutron star merger. As the first such candidate system, it's
properties such as masses and spin are of great interest. Although LVC policy
prohibits disclosure of these properties in preliminary announcements, LVC does
release the estimated probabilities that this system is in specific categories,
such as binary neutron star, binary black hole and black hole-neutron star. LVC
also releases information concerning relative signal strength, distance, and
the probability that ejected mass or a remnant disc survived the merger. In the
case of events with a finite probability of being in more than one category,
such as is likely to occur with a black hole-neutron star merger, it is shown
how to estimate the masses of the components and the spin of the black hole.
This technique is applied to the source S190426c.
