{
  "id": "1801.10151",
  "version": "v1",
  "published": "2018-01-30T02:45:09.000Z",
  "updated": "2018-01-30T02:45:09.000Z",
  "title": "NuSTAR view of the central region of M 31",
  "authors": [
    "H. Stiele",
    "A. K. H. Kong"
  ],
  "comment": "14 pages, 8 figures, accepted by MNRAS",
  "doi": "10.1093/mnras/sty106",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "Our neighbouring large spiral galaxy, the Andromeda galaxy (M 31 or NGC 224), is an ideal target to study the X-ray source population of a nearby galaxy. NuSTAR observed the central region of M 31 in 2015 and allows studying the population of X-ray point sources at energies higher than 10 keV. Based on the source catalogue of the large XMM-Newton survey of M 31, we identified counterparts to the XMM-Newton sources in the NuSTAR data. The NuSTAR data only contain sources of a brightness comparable (or even brighter) than the selected sources that have been detected in XMM-Newton data. We investigate hardness ratios, spectra and long-term light curves of individual sources obtained from NuSTAR data. Based on our spectral studies we suggest four sources as possible X-ray binary candidates. The long-term light curves of seven sources that have been observed more than once show low (but significant) variability.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-01-30T02:45:09.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "central region",
      "nustar view",
      "nustar data",
      "long-term light curves",
      "x-ray point sources"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}