{
  "id": "1807.10696",
  "version": "v1",
  "published": "2018-07-27T15:46:52.000Z",
  "updated": "2018-07-27T15:46:52.000Z",
  "title": "Detection of a cyclotron line in SXP 15.3 during its 2017 outburst",
  "authors": [
    "Chandreyee Maitra",
    "Biswajit Paul",
    "Frank Haberl",
    "Georgios Vasilopoulos"
  ],
  "comment": "5 pages, 6 figures, accepted for publication in MNRAS Letters",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "We report the results of AstroSat and NuSTAR observations of the Be/X-ray binary pulsar SXP 15.3 in the Small Magellanic Cloud during its outburst in late 2017, when the source reached a luminosity level of ~ 10^{38} erg s^{-1}, close to the Eddington limit. The unprecedented broadband coverage of the source allowed us to perform timing and spectral analysis between 3 and 80 keV. The pulse profile exhibits a significant energy dependence, and morphs from a double peaked profile to a single broad pulse at energies >15 keV. This can be explained by a spectral hardening during an intensity dip seen between the two peaks of the pulse profile. We detect a Cyclotron Resonance Scattering Feature (CRSF) at ~5 keV in the X-ray spectrum, independent of the choice of the continuum model. This indicates a magnetic field strength of 6x10^{11} G for the neutron star.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-07-27T15:46:52.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cyclotron line",
      "be/x-ray binary pulsar sxp",
      "cyclotron resonance scattering feature",
      "single broad pulse",
      "significant energy dependence"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}