{
  "id": "1407.7657",
  "version": "v1",
  "published": "2014-07-29T08:02:23.000Z",
  "updated": "2014-07-29T08:02:23.000Z",
  "title": "Detection of a QPO in 5 XMM-Newton observations of RE J1034+396",
  "authors": [
    "W. N. Alston",
    "J. Markevičiūtė",
    "E. Kara",
    "A. C. Fabian",
    "M. Middleton"
  ],
  "comment": "6 pages, 3 figures. Accepted for publication in MNRAS Letters",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "The X-ray quasi-periodic oscillation (QPO) at $\\sim 2.6 \\times 10^{-4}$ Hz in RE J1034+396 has been robustly observed in the 0.2-10 keV band of one $\\sim 90$ ks XMM-Newton observation, but was not detected in subsequent observations. Here, we investigate the power spectral density (PSD) of 8 archival XMM-Newton observations of RE J1034+396, and search for the presence of QPOs in three energy bands: soft (0.3-0.8 keV); hard (1.0-4.0 keV) and total (0.2-10.0 keV). We find a significant detection of a QPO feature in the hard-band PSD of 5 low flux/spectrally-harder observations. The QPO frequency has remained persistent at $\\sim 2.6 \\times 10^{-4}$ Hz over $\\sim 4$ years of observations, though it is no longer detected in the soft band, except in the original observation. This result increases the duration where the QPO is present by a factor of three (now $\\sim 250$ ks), allowing for a better understanding of the QPO phenomenon observed in both Active Galactic Nuclei (AGN) and black hole X-ray binaries (BHBs).",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-07-29T08:02:23.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black hole x-ray binaries",
      "x-ray quasi-periodic oscillation",
      "archival xmm-newton observations",
      "ks xmm-newton observation",
      "low flux/spectrally-harder observations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1093/mnrasl/slu127",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2014,
      "month": "Nov",
      "volume": 445,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1308710,
      "adsabs": "2014MNRAS.445L..16A"
    }
  }
}