{
  "id": "1503.07670",
  "version": "v1",
  "published": "2015-03-26T10:08:54.000Z",
  "updated": "2015-03-26T10:08:54.000Z",
  "title": "Estimating the magnetic field strength from magnetograms",
  "authors": [
    "A. Asensio Ramos",
    "M. J. Martinez Gonzalez",
    "R. Manso Sainz"
  ],
  "comment": "8 pages, 7 figures, accepted for publication in A&A",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "A properly calibrated longitudinal magnetograph is an instrument that measures circular polarization and gives an estimation of the magnetic flux density in each observed resolution element. This usually constitutes a lower bound of the field strength in the resolution element, given that it can be made arbitrarily large as long as it occupies a proportionally smaller area of the resolution element and/or becomes more transversal to the observer and still produce the same magnetic signal. Yet, we know that arbitrarily stronger fields are less likely --hG fields are more probable than kG fields, with fields above several kG virtually absent-- and we may even have partial information about its angular distribution. Based on a set of sensible considerations, we derive simple formulae based on a Bayesian analysis to give an improved estimation of the magnetic field strength for magnetographs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-03-26T10:08:54.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic field strength",
      "resolution element",
      "magnetograms",
      "magnetic flux density",
      "measures circular polarization"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}