Persistent and Transient Blank Field Sources
  Blank field sources (BFS) are good candidates for hosting dim isolated neutron stars (DINS). The results of a search of BFS in the ROSAT HRI images are revised. We then focus on transient BFS, arguing that they belong to a rather large population. The perspectives of future research on DINS are then discussed. 
A. Treves, S. Campana, M. Chieregato, A. Moretti, T. Nelson, M. Orio