October 11, 2021 Poster Open Access

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

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    <subfield code="a">fBLS — a fast folding algorithm to produce BLS periodograms in search for transiting planets</subfield>
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    <subfield code="a">&lt;p&gt;We present&amp;nbsp;&lt;em&gt;fBLS&lt;/em&gt;&amp;nbsp;&amp;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&amp;nbsp;simultaneously produces all the binned phase-folded lightcurves for an array of Np &amp;lsquo;sufficiently different&amp;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&amp;nbsp;fBLS, creating a standard BLS periodogram. We present&lt;em&gt;&amp;nbsp;fBLS&lt;/em&gt;&amp;nbsp;capabilities by applying it to Kepler data, finding known and new planets. When applied to&amp;nbsp;PLATO&amp;nbsp;lightcurves, it will detect small rocky transiting planets, with periods shorter than one day, a period range for which the computation is extensive.&amp;nbsp;&lt;em&gt;fBLS&amp;nbsp;&lt;/em&gt;will also be used to detect transiting planets with varying duration and transit timing.&lt;/p&gt;</subfield>
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