LASR-guided stellar photometric variability subtraction
We develop a technique for removing stellar variability in the light curves of δ-Scuti and similar stars. Our technique, which we name the Linear Algorithm for Significance Reduction (LASR), subtracts oscillations from a time series by minimizing their statistical significance in frequency space. We...
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| Veröffentlicht in: | Astronomy and astrophysics (Berlin) 2018-07, Vol.615 |
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| container_title | Astronomy and astrophysics (Berlin) |
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| creator | Ahlers, John P. Barnes, Jason W. Horvath, Sarah A. Myers, Samuel A. Hedman, Matthew M. |
| description | We develop a technique for removing stellar variability in the light curves of δ-Scuti and similar stars. Our technique, which we name the Linear Algorithm for Significance Reduction (LASR), subtracts oscillations from a time series by minimizing their statistical significance in frequency space. We demonstrate that LASR can subtract variable signals of near-arbitrary complexity and can robustly handle close frequency pairs and overtone frequencies. We demonstrate that our algorithm performs an equivalent fit as prewhitening to the straightforward variable signal of KIC 9700322. We also show that LASR provides a better fit to seismic activity than prewhitening in the case of the complex δ-Scuti KOI-976. |
| doi_str_mv | 10.1051/0004-6361/201732446 |
| format | Article |
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Our technique, which we name the Linear Algorithm for Significance Reduction (LASR), subtracts oscillations from a time series by minimizing their statistical significance in frequency space. We demonstrate that LASR can subtract variable signals of near-arbitrary complexity and can robustly handle close frequency pairs and overtone frequencies. We demonstrate that our algorithm performs an equivalent fit as prewhitening to the straightforward variable signal of KIC 9700322. 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| ispartof | Astronomy and astrophysics (Berlin), 2018-07, Vol.615 |
| issn | 0004-6361 1432-0746 |
| language | eng |
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| source | Bacon EDP Sciences France Licence nationale-ISTEX-PS-Journals-PFISTEX; EDP Sciences; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Algorithms asteroseismology Complexity methods: data analysis methods: numerical Photometry Prewhitening Seismic activity stars: variables: delta Scuti Subtraction techniques: polarimetric Variability |
| title | LASR-guided stellar photometric variability subtraction |
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