Discovery of 40.5 ks Hard X-Ray Pulse-phase Modulations from SGR 1900+14

  title={Discovery of 40.5 ks Hard X-Ray Pulse-phase Modulations from SGR 1900+14},
  author={Kazuo Makishima and Tsubasa Tamba and Yuki Aizawa and Hirokazu Odaka and Hiroki Yoneda and Teruaki Enoto and H. Suzuki},
  journal={The Astrophysical Journal},
  • K. Makishima, T. Tamba, +4 authors H. Suzuki
  • Published 23 September 2021
  • Physics
  • The Astrophysical Journal
X-ray timing properties of the magnetar SGR 1900+14 were studied, using the data taken with Suzaku in 2009 and NuSTAR in 2016, for a time lapse of 114 and 242 ks, respectively. On both occasions, the object exhibited the characteristic two-component spectrum. The soft component, dominant in energies below ∼5 keV, showed a regular pulsation, with a period of P = 5.21006 s as determined with the Suzaku XIS, and P = 5.22669 with NuSTAR. However, in ≳ 6 keV where the hard component dominates, the… 


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  • K. Makishima
  • Medicine, Physics
    Proceedings of the Japan Academy. Series B, Physical and biological sciences
  • 2016
A review is given to some aspects of neutron stars (NSs), with a particular emphasis on the magnetic fields (MFs) of mass-accreting NSs and magnetars, and a discussion is made on the origin and evolution of these strong MFs.