{
  "id": "1810.09489",
  "version": "v1",
  "published": "2018-10-22T18:24:33.000Z",
  "updated": "2018-10-22T18:24:33.000Z",
  "title": "OGLE Collection of Galactic Cepheids",
  "authors": [
    "A. Udalski",
    "I. Soszyński",
    "P. Pietrukowicz",
    "M. K. Szymański",
    "D. M. Skowron",
    "J. Skowron",
    "P. Mróz",
    "R. Poleski",
    "S. Kozłowski",
    "K. Ulaczyk",
    "K. Rybicki",
    "P. Iwanek",
    "M. Wrona"
  ],
  "comment": "25 pages, 6 figures. OGLE data of Galactic Cepheids will be available from the OGLE Archive when the paper is accepted for publication",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present here a new major part of the OGLE Collection of Variable Stars - OGLE Collection of Galactic Cepheids. The new dataset was extracted from the Galaxy Variability Survey images - a dedicated large-scale survey of the Galactic disk and outer bulge conducted by the OGLE project since 2013. The OGLE collection contains 2718 Cepheids of all types - classical, type II and anomalous. It more than doubles the number of known Galactic classical Cepheids. Due to the long-term monitoring and large number of epochs the selected sample is very pure, generally free from contaminating stars of other types often mimicking Cepheids. Its completeness is high at 90% level for classical Cepheids - tested using recent samples of Galactic Cepheids: ASAS-SN, ATLAS, Gaia DR2 and Wise catalog of variable stars. Our comparisons indicate that the completeness of the two latter datasets, Gaia DR2 and Wise catalog, is very low, at < 10% level in the magnitude range of the OGLE GVS survey (10.8 < I < 19.5 mag). Both these samples are severely contaminated by non-Cepheids (the purity is 67% and 56%, respectively). We also present several interesting objects found in the new OGLE Collection - multi-mode pulsators, a first Galactic candidate for eclipsing system containing Cepheid, a binary Cepheid candidate.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-10-22T18:24:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galactic cepheids",
      "gaia dr2",
      "galaxy variability survey images",
      "variable stars",
      "ogle gvs survey"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 25,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}