For decades astronomers have been puzzled by a gap that lies between the mass of neutron stars and black holes: The heaviest known neutron star is no more than 2.5 times the mass of our sun and the lightest known black hole is about 5 solar masses.
This newly discovered object lies in this so-called “mass gap.” post 
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https://ligo.northwestern.edu/media/mass-plot/index.html HEIGHT 200
Observations with electromagnetic radiation are a confident way to solve the neutron star or a black hole question. If the neutron star was torn apart by the black hole, the dynamics of the remnant matter could produce light, similar to the neutron star merger GW170817 in 2017. Observation of light would mean this was a neutron star. But unfortunately, this particular event was pretty far away, so the light may be too dim. post
There is also the possibility that the neutron star was not torn apart but swallowed by the black hole, in which case there is no light. In the future, if we have a better understanding of what a neutron star is made of – its “equation of state” – we could rule out black holes with more confidence.
We stand to learn the most from multi-messenger observations, but the duration of these events in the sky is very short. We need rapid communication between LIGO and other partner observing facilities to coordinate.
VIMEO 413180380 Published April 29, 2020.
Artistic rendering of the GW190814 event, in which a smaller compact object is swallowed by a 9-times-more-massive black-hole. The matter stream between the two objects and the look of the massive black hole are an artistic invention. To the best of our knowledge, the GW190814 fusion is not thought to have emitted any light.