Thanks.
I was going to ask whether the article was using the term "pulsar" when "neutron star" would have been more accurate; I would have said that a pulsar was a rotating neutron star with a beam that intermittently points at Earth (making the distinction observer-specific).
But don't essentially all neutron stars spin? I don't know how a non-rotating neutron star might form. If that's the case, they could have just said "neutron star", and I wouldn't then have this issue about the subjectivity of what a pulsar is.