Evidence for a resonant cyclotron line in IGR J16493−4348 from the Swift-BAT hard X-ray survey

@article{Adai2011EvidenceFA,
  title={Evidence for a resonant cyclotron line in IGR J16493−4348 from the Swift-BAT hard X-ray survey},
  author={Adai and G Cusumano and V. La Parola and A. Segreto and Tiziana di Salvo and R. Iaria and Natale R. Robba},
  journal={Astronomy and Astrophysics},
  year={2011},
  volume={532},
  pages={73-79}
}
Context. Resonant absorption cyclotron features are a key diagnostic tool to directly measure the strength of the magnetic field of accreting neutron stars. However, typical values of cyclotron features lie in the high-energy part of the spectrum between 20 keV and 50 keV, where detection is often damped by the low quality statistics of results derived from single pointed observations. Aims. We show that long-term monitoring campaign performed with Swift-BAT of persistently, but faint… 
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