Evidence of a Cyclotron Feature in the Spectrum of the Anomalous X-Ray Pulsar 1RXS J170849-400910 (Articolo in rivista)

Type
Label
  • Evidence of a Cyclotron Feature in the Spectrum of the Anomalous X-Ray Pulsar 1RXS J170849-400910 (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • Rea, Nanda; Israel, Gian Luca; Stella, Luigi; Oosterbroek, Tim; Mereghetti, Sandro; Angelini, Lorella; Campana, Sergio; Covino, Stefano (2003)
    Evidence of a Cyclotron Feature in the Spectrum of the Anomalous X-Ray Pulsar 1RXS J170849-400910
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Rea, Nanda; Israel, Gian Luca; Stella, Luigi; Oosterbroek, Tim; Mereghetti, Sandro; Angelini, Lorella; Campana, Sergio; Covino, Stefano (literal)
Pagina inizio
  • L65 (literal)
Pagina fine
  • L69 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 586 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • Evidence of a Cyclotron Feature in the Spectrum of the Anomalous X-Ray Pulsar 1RXS J170849-400910 (literal)
Abstract
  • We report the results of a long observation of the anomalous X-ray pulsar 1RXS J170849-400910 obtained with the BeppoSAX satellite in 2001 August. The best-fit phase-averaged spectrum was an absorbed power-law plus blackbody model, with a photon index of Γ~2.4 and a blackbody temperature of kTbb~0.4 keV. We confirm the presence of significant spectral variations with the rotational phase of the pulsar. In the spectrum corresponding to the rising part of the pulse, we found an absorption-like feature at ~8.1 keV (a significance of 4 σ), most likely due to cyclotron resonant scattering. The centroid energy converts to a magnetic field of 9×1011 and 1.6×1015 G in the case of electrons and protons, respectively. If confirmed, this would be the first detection of a cyclotron feature in the spectrum of an anomalous X-ray pulsar. (literal)
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