eleanor: An Open-source Tool for Extracting Light Curves from the TESS Full-frame Images
Autor: | Daniel Foreman-Mackey, Rodrigo Luger, Nicholas Saunders, Daniel Scolnic, Jessie L. Christiansen, Jacob L. Bean, Adina D. Feinstein, Christina Hedges, Megan Bedell, José Vinícius de Miranda Cardoso, Benjamin T. Montet |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
010504 meteorology & atmospheric sciences
Aperture Computer science media_common.quotation_subject FOS: Physical sciences 01 natural sciences Photometry (optics) Planet 0103 physical sciences 010303 astronomy & astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) Solar and Stellar Astrophysics (astro-ph.SR) 0105 earth and related environmental sciences media_common Earth and Planetary Astrophysics (astro-ph.EP) Background subtraction Astronomy Astronomy and Astrophysics Light curve Exoplanet Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Sky Satellite Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Earth and Planetary Astrophysics |
Popis: | During its two year prime mission the Transiting Exoplanet Survey Satellite (TESS) will perform a time-series photometric survey covering over 80% of the sky. This survey comprises observations of 26 24 x 96 degree sectors that are each monitored continuously for approximately 27 days. The main goal of TESS is to find transiting planets around 200,000 pre-selected stars for which fixed aperture photometry is recorded every two minutes. However, TESS is also recording and delivering Full-Frame Images (FFIs) of each detector at a 30 minute cadence. We have created an open-source tool, eleanor, to produce light curves for objects in the TESS FFIs. Here, we describe the methods used in eleanor to produce light curves that are optimized for planet searches. The tool performs background subtraction, aperture and PSF photometry, decorrelation of instrument systematics, and cotrending using principal component analysis. We recover known transiting exoplanets in the FFIs to validate the pipeline and perform a limited search for new planet candidates in Sector 1. Our tests indicate that eleanor produces light curves with significantly less scatter than other tools that have been used in the literature. Cadence-stacked images, and raw and detrended eleanor light curves for each analyzed star will be hosted on MAST, with planet candidates on ExoFOP-TESS as Community TESS Objects of Interest (CTOIs). This work confirms the promise that the TESS FFIs will enable the detection of thousands of new exoplanets and a broad range of time domain astrophysics. Comment: 21 pages, 13 figures, 2 tables, Accepted to PASP |
Databáze: | OpenAIRE |
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