An efficient photoelectric X-ray polarimeter for the study of black holes and neutron stars

  title={An efficient photoelectric X-ray polarimeter for the study of black holes and neutron stars},
  author={Enrico Costa and Paolo Soffitta and Ronaldo Bellazzini and Alessandro Brez and Nick Lumb and Gloria Spandre},
The study of astronomical objects using electromagnetic radiation involves four basic observational approaches: imaging, spectroscopy, photometry (accurate counting of the photons received) and polarimetry (measurement of the polarizations of the observed photons). In contrast to observations at other wavelengths, a lack of sensitivity has prevented X-ray astronomy from making use of polarimetry. Yet such a technique could provide a direct picture of the state of matter in extreme magnetic and… 

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