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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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{
  "description": "<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>", 
  "license": "https://creativecommons.org/licenses/by/4.0/legalcode", 
  "creator": [
    {
      "affiliation": "Weizmann Institute of Science: Rehovot, IL", 
      "@id": "https://orcid.org/0000-0001-9298-8068", 
      "@type": "Person", 
      "name": "Sahar Shahaf"
    }, 
    {
      "affiliation": "Weizmann Institute of Science: Rehovot, IL", 
      "@type": "Person", 
      "name": "Barak Zackay"
    }, 
    {
      "affiliation": "Aix Marseille University, CNRS, CNES, LAM, Marseille, France", 
      "@type": "Person", 
      "name": "Pascal Guterman"
    }, 
    {
      "affiliation": "School of Physics and Astronomy, Tel Aviv University, Tel Aviv, 6997801, Israel.", 
      "@type": "Person", 
      "name": "Tsevi Mazeh"
    }, 
    {
      "affiliation": "Porter School of the Environment and Earth Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel.", 
      "@type": "Person", 
      "name": "Shay Zucker"
    }, 
    {
      "affiliation": "School of Physics and Astronomy, Tel Aviv University, Tel Aviv, 6997801, Israel.", 
      "@type": "Person", 
      "name": "Simchon Faigler"
    }
  ], 
  "url": "https://zenodo.org/record/5559886", 
  "datePublished": "2021-10-11", 
  "@context": "https://schema.org/", 
  "identifier": "https://doi.org/10.5281/zenodo.5559886", 
  "@id": "https://doi.org/10.5281/zenodo.5559886", 
  "@type": "CreativeWork", 
  "name": "fBLS \u2014 a fast folding algorithm to produce BLS periodograms in search for transiting planets"
}
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