{
  "id": "astro-ph/0006224",
  "version": "v1",
  "published": "2000-06-16T02:32:41.000Z",
  "updated": "2000-06-16T02:32:41.000Z",
  "title": "ASCA Observation of the Lyman-limit Quasar PKS2145+067",
  "authors": [
    "N. Y. Yamasaki",
    "T. Ishikawa",
    "T. Ohashi"
  ],
  "comment": "15 pages, 3figures, Latex(PASJadd,sty, PASJ95.sty) accepted in PASJ",
  "categories": [
    "astro-ph"
  ],
  "abstract": "X-ray observation of a famous Lyman-limit quasar PKS2145+067at z_em= 0.990 was carried with ASCA. The source showed a 2-10 keV flux of 1.3 E-11 erg cm^-2 sec^-1 (L_X = 2.5 E46 erg sec^-1 for H_0=50 km s^-1 Mpc^-1) described by a power-law spectrum with a photon index Gamma=1.63 +/- 0.04 . In the ASCA energy band, no excess absorption was detected implying the absorption column density at z_ ab=0.791 was less than 1.6 E21 cm^-2 if absorbing medium had a metal abundance of 0.5 solar. Comparison with previous Einstein and ROSAT observations shows that PKS2145+067 has increased its luminosity by a factor of 2--3 between 1991 and 1998.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-06-16T02:32:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "asca observation",
      "absorption column density",
      "asca energy band",
      "rosat observations",
      "e46 erg"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1093/pasj/52.5.763"
    },
    "note": {
      "typesetting": "LaTeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 546291
    }
  }
}