Poster Open Access

fBLS — a fast folding algorithm to produce BLS periodograms in search for transiting planets

Sahar Shahaf; Barak Zackay; Pascal Guterman; Tsevi Mazeh; Shay Zucker; Simchon Faigler


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{
  "publisher": "Zenodo", 
  "DOI": "10.5281/zenodo.5559886", 
  "author": [
    {
      "family": "Sahar Shahaf"
    }, 
    {
      "family": "Barak Zackay"
    }, 
    {
      "family": "Pascal Guterman"
    }, 
    {
      "family": "Tsevi Mazeh"
    }, 
    {
      "family": "Shay Zucker"
    }, 
    {
      "family": "Simchon Faigler"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2021, 
        10, 
        11
      ]
    ]
  }, 
  "abstract": "<p>We present&nbsp;<em>fBLS</em>&nbsp;&ndash; a novel technique for detecting transiting planets. fBLS is based on the fast-folding algorithm (FFA; Staelin 1969), extensively used in pulsar astronomy (e.g., Morello et al. 2020). fBLS&nbsp;simultaneously produces all the binned phase-folded lightcurves for an array of Np &lsquo;sufficiently different&rsquo; trial periods, with O(Np*log(N)) arithmetic operations (while regular BLS requires O(Np*N) operations). We compute the standard BLS statistic for each folded lightcurve produced by&nbsp;fBLS, creating a standard BLS periodogram. We present<em>&nbsp;fBLS</em>&nbsp;capabilities by applying it to Kepler data, finding known and new planets. When applied to&nbsp;PLATO&nbsp;lightcurves, it will detect small rocky transiting planets, with periods shorter than one day, a period range for which the computation is extensive.&nbsp;<em>fBLS&nbsp;</em>will also be used to detect transiting planets with varying duration and transit timing.</p>", 
  "title": "fBLS \u2014 a fast folding algorithm to produce BLS periodograms in search for transiting planets", 
  "type": "graphic", 
  "id": "5559886"
}
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