Just as I have advised you about in the other thread discussing Neutron stars, the results and conclusions reached, are a result of the evidence available. The "nearby" Supernova SN 1987A was visible to the naked eye and its progress and evolution has been under constant observation and research over more then three decades now. In line with the mathematics involved, scientific theory predicted either a Neutron star or a black hole. There is absolutely no reason for mainstream science to doubt this. The final and irrefutable evidence available, and as detailed in the original paper and article, now confirms a neutron star. If however you have any other as yet unknown and unobserved evidence, suggesting anything else, then please follow the scientific methodology, write up a paper with that evidence, and submit it for peer review. Mainstream science would be over joyed at any new information you have. In the meantime, assumptions just don't cut it.
In the meantime and in support of the status quo and original estatic A article.....
https://www.science.org/doi/10.1126/science.adj5796
Editor’s summary
"The nearby supernova SN 1987A was visible to the naked eye, and its evolution has been observed over the ensuing decades. The explosion is thought to have produced a neutron star or black hole, but none has been directly detected. Fransson et al. observed a remnant of SN 1987A using near- and mid-infrared integral field spectroscopy. They identified emission lines of ionized argon that appear only near the center of the remnant. Photoionization models show that the line ratios and velocities can be explained by ionizing radiation from a neutron star illuminating gas from the inner parts of the exploded star. —Keith T. Smith"
Abstract
"The nearby Supernova 1987A was accompanied by a burst of neutrino emission, which indicates that a compact object (a neutron star or black hole) was formed in the explosion. There has been no direct observation of this compact object. In this work, we observe the supernova remnant with JWST spectroscopy, finding narrow infrared emission lines of argon and sulfur. The line emission is spatially unresolved and blueshifted in velocity relative to the supernova rest frame. We interpret the lines as gas illuminated by a source of ionizing photons located close to the center of the expanding ejecta. Photoionization models show that the line ratios are consistent with ionization by a cooling neutron star or a pulsar wind nebula. The velocity shift could be evidence for a neutron star natal kick."
More at link............................