{
  "id": "astro-ph/9612031",
  "version": "v1",
  "published": "1996-12-03T13:32:34.000Z",
  "updated": "1996-12-03T13:32:34.000Z",
  "title": "Faint galaxies around quasars at z=1 and gravitational lensing of distant objects",
  "authors": [
    "J. W. Fried"
  ],
  "comment": "16 pages, 5 postscript figures, accepted by A&A, main journal",
  "categories": [
    "astro-ph"
  ],
  "abstract": "Very deep imaging data of three optically luminous radio-loud quasars with redshifts between z=0.9 and z=1.36 are presented. The data are complete for galaxies down to R=26. There is no evidence for excess numbers of galaxies around the quasars; foreground galaxy clusters are excluded by the data as well as clusters with richness classes greater than 1 associated with the quasars. We find clear evidence for gravitational lensing for two quasars. It is further shown that due to the high surface density of galaxies all distant (z>1) objects are moderately affected by gravitational lensing; the amplification factors are estimated to be in the range 1.1-1.5.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1996-12-03T13:32:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "gravitational lensing",
      "distant objects",
      "faint galaxies",
      "foreground galaxy clusters",
      "high surface density"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 437016
    }
  }
}