F4_W_weasel sends us to the BBC for news of the eighth lone neutron star
ever discovered. It has no associated supernova remnant, binary companion, or radio pulsations. It's in our stellar neighborhood, at most 1,000 light years away. The object emits all its radiation (as far as wa can detect with current instruments) in X rays. The object is called Calvera, after the bad guy in The Magnificent Seven
— which is itself the collective nickname for the seven such objects previously known.