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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    "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>", 
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    "title": "fBLS \u2014 a fast folding algorithm to produce BLS periodograms in search for transiting planets", 
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    "references": [
      "Staelin D. H., 1969, Proceedings of the IEEE, 57, 724", 
      "Morello V., Barr E. D., Stappers B. W., Keane E. F., Lyne A. G., 2020,MNRAS, 497, 4654", 
      "Kov\u00e1cs G., Zucker S., Mazeh T., 2002, A&A, 391, 369", 
      "Shahaf S., Mazeh T., Zucker S., Fabrycky D., 2021, MNRAS, 505, 1293", 
      "Winn J. N., Sanchis-Ojeda R., Rappaport S., 2018, New Astron. Rev., 83, 37"
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    "publication_date": "2021-10-11", 
    "creators": [
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        "affiliation": "Weizmann Institute of Science: Rehovot, IL", 
        "name": "Sahar Shahaf"
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        "affiliation": "Weizmann Institute of Science: Rehovot, IL", 
        "name": "Barak Zackay"
      }, 
      {
        "affiliation": "Aix Marseille University, CNRS, CNES, LAM, Marseille, France", 
        "name": "Pascal Guterman"
      }, 
      {
        "affiliation": "School of Physics and Astronomy, Tel Aviv University, Tel Aviv, 6997801, Israel.", 
        "name": "Tsevi Mazeh"
      }, 
      {
        "affiliation": "Porter School of the Environment and Earth Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel.", 
        "name": "Shay Zucker"
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        "affiliation": "School of Physics and Astronomy, Tel Aviv University, Tel Aviv, 6997801, Israel.", 
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