{
  "id": "1903.03210",
  "version": "v1",
  "published": "2019-03-07T22:49:45.000Z",
  "updated": "2019-03-07T22:49:45.000Z",
  "title": "IGR J17503-2636: a candidate supergiant fast X-ray transient",
  "authors": [
    "C. Ferrigno",
    "E. Bozzo",
    "A. Sanna",
    "G. K. Jaisawal",
    "J. M. Girard",
    "T. Di Salvo",
    "L. Burderi"
  ],
  "comment": "Submitted to A&A, revised version after referee's comments",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "IGR J17503-2636 is a hard X-ray transient discovered by INTEGRAL on 2018 August 11. This was the first ever reported X-ray emission from this source. Following the discovery, follow-up observations were carried out with Swift, Chandra, NICER, and NuSTAR. We report in this paper the analysis and results obtained from all these X-ray data. Based on the fast variability in the X-ray domain, the spectral energy distribution in the 0.5-80 keV energy range, and the reported association with a highly reddened OB supergiant at ~10 kpc, we conclude that IGR J17503-2636 is most likely a relatively faint new member of the supergiant fast X-ray transients. Spectral analysis of the NuSTAR data revealed a broad feature in addition to the typical power-law with exponential roll-over at high energy. This can be modeled either in emission or as a cyclotron scattering feature in absorption. If confirmed by future observations, this feature would indicate that IGR J17503-2636 hosts a strongly magnetized neutron star with B~2e12 G.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-03-07T22:49:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "candidate supergiant fast x-ray transient",
      "kev energy range",
      "hard x-ray transient",
      "spectral energy distribution",
      "neutron star"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}