Hello
It seems that some people feel that they know a bit of Neutron Matter.
For now just picking on one point.
What formed the Supernova?
To create such a form, it would take quite a powerful solar dynamo in the form of Neutron matter or may be a hybrid with quark matter or a pasta form.
Regardless the magnetic fields required to form a Nova or a supernova with a remnant left behind such as a Neutron star or some other exotic ultra dense matter would require an initial ultra dense matter.
I just dropped in for 2 secs. I can go deeper into this field.