The prospects for X-ray polarimetry and its potential use for   understanding neutron stars
  We review the state of the art for measuring the X-ray polarization of neutron stars. We discuss how valuable precision measurements of the degree and position angle of polarization as a function of energy and, where relevant, of pulse phase, would provide deeper insight into the details of the emission mechanisms. We then review the current state of instrumentation and its potential for obtaining relevant data. Finally, we conclude our discussion with some opinions as to future directions. 
M.C. Weisskopf, R.F. Elsner, D. Hanna, V.M. Kaspi, S.L. O'Dell, G.G.   Pavlov, and B.D. Ramsey