{
  "id": "1411.1573",
  "version": "v1",
  "published": "2014-11-06T11:32:00.000Z",
  "updated": "2014-11-06T11:32:00.000Z",
  "title": "NuSTAR observation of the center of the Coma cluster",
  "authors": [
    "F. Gastaldello",
    "D. R. Wik",
    "S. Molendi",
    "N. J. Westergaard",
    "A. Hornstrup",
    "G. Madejski",
    "D. D. M. Ferreira",
    "S. E. Boggs",
    "F. E. Christensen",
    "W. W. Craig",
    "B. W. Grefenstette",
    "C. J. Hailey",
    "F. A. Harrison",
    "K. K. Madsen",
    "D. Stern",
    "W. W. Zhang"
  ],
  "comment": "8 pages, 7 figures, ApJ submitted",
  "categories": [
    "astro-ph.HE",
    "astro-ph.CO"
  ],
  "abstract": "We present the results of a 55ks NuSTAR observation of the core of the Coma cluster. The global spectrum can be explained by thermal gas emission, with a conservative 90% upper limit to non-thermal inverse Compton (IC) emission of $5.1 \\times 10^{-12}$ erg cm$^{-2}$ s$^{-1}$ in a 12 arcmin $\\times$ 12 arcmin field of view . The brightness of the thermal component in this central region does not allow more stringent upper limits on the IC component when compared with non-imaging instruments with much larger field of views where claims of detections have been made. Future mosaic NuSTAR observations of Coma will further address this issue. The temperature map shows a relatively uniform temperature distribution with a gradient from the hot northwest side to the cooler southeast, in agreement with previous measurements. The temperature determination is robust given the flat effective area and low background in the 3-20 keV band, making NuSTAR an ideal instrument to measure high temperatures in the ICM.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-11-06T11:32:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "coma cluster",
      "mosaic nustar observations",
      "stringent upper limits",
      "55ks nustar observation",
      "non-thermal inverse compton"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/800/2/139",
      "journal": "The Astrophysical Journal",
      "year": 2015,
      "month": "Feb",
      "volume": 800,
      "number": 2,
      "pages": 139
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1326384,
      "adsabs": "2015ApJ...800..139G"
    }
  }
}