{
  "id": "astro-ph/9802211",
  "version": "v1",
  "published": "1998-02-16T00:29:05.000Z",
  "updated": "1998-02-16T00:29:05.000Z",
  "title": "A Remark on the Estimation of Angular Power Spectra in the Presence of Foregrounds",
  "authors": [
    "Martin White"
  ],
  "comment": "3 pages, no figures, to appear in Phys Rev D",
  "journal": "Phys.Rev.D57:5273-5275,1998",
  "doi": "10.1103/PhysRevD.57.5273",
  "categories": [
    "astro-ph"
  ],
  "abstract": "It is common practice to estimate the errors on the angular power spectrum which could be obtained by an experiment with a given angular resolution and noise level. Several authors have also addressed the question of foreground subtraction using multi-frequency observations. In such observations the angular resolution of the different frequency channels is rarely the same. In this report we point out how the ``effective'' beam size and noise level change with ell in this case, and give an expression for the error on the angular power spectrum as a function of ell.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1998-02-16T00:29:05.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "angular power spectrum",
      "angular resolution",
      "estimation",
      "noise level change",
      "common practice"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 3,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 469724
    }
  }
}