{
  "id": "0912.0793",
  "version": "v1",
  "published": "2009-12-04T08:44:41.000Z",
  "updated": "2009-12-04T08:44:41.000Z",
  "title": "New intrinsic-colour calibration for $uvby$--$β$ photometry",
  "authors": [
    "Yuksel Karatas",
    "William J. Schuster"
  ],
  "comment": "18 pages, 3 figures, accepted to New Astronomy",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "A new intrinsic-colour calibration ($(b$--$y)_{o}$--$\\beta$) is presented for the $uvby$--$\\beta$ photometric system, making use of re-calibrated Hipparcos parallaxes and published reddening maps. This new calibration for $(b$--$y)_{o}$--$\\beta$, our Equation (1), has been based upon stars with $d_{Hip} < 70$ pc in the photometric catalogues of Schuster et al. (1988, 1993, 2006), provides a small dispersion, $\\pm0.009$, and has a positive ``standard'' $+2.239\\Delta\\beta$ coefficient, which is not too different from the coefficients of Crawford (+1.11; 1975a) and of Olsen (+1.34; 1988). For 61 stars with spectra from CASPEC, UVES/VLT, and FIES/NOT databases, without detectable Na I lines, the average reddening value $<E(b-y) > = -0.001\\pm0.002$ shows that any zero-point correction to our intrinsic-colour equation must be minuscule.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-12-04T08:44:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "intrinsic-colour calibration",
      "photometry",
      "photometric system",
      "re-calibrated hipparcos parallaxes",
      "intrinsic-colour equation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1016/j.newast.2009.12.003",
      "journal": "New Astronomy",
      "year": 2010,
      "month": "Jul",
      "volume": 15,
      "number": 5,
      "pages": 444
    },
    "note": {
      "typesetting": "TeX",
      "pages": 18,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 838954,
      "adsabs": "2010NewA...15..444K"
    }
  }
}