Identifying Exoplanets with Deep Learning. III. Automated Triage and Vetting of TESS Candidates

Yu, Liang and Vanderburg, Andrew and Huang, Chelsea ORCID: and Shallue, Christopher J. and Crossfield, Ian J. M. and Gaudi, B. Scott and Daylan, Tansu and Dattilo, Anne and Armstrong, David J. and Ricker, George R. and Vanderspek, Roland K. and Latham, David W. and Seager, Sara and Dittmann, Jason and Doty, John P. and Glidden, Ana and Quinn, Samuel N. (2019) Identifying Exoplanets with Deep Learning. III. Automated Triage and Vetting of TESS Candidates. The Astronomical Journal, 158 (1):25. pp. 1-15. ISSN 0004-6256

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NASA’s Transiting Exoplanet Survey Satellite (TESS) presents us with an unprecedented volume of space-based photometric observations that must be analyzed in an efficient and unbiased manner. With at least ∼1,000,000 new light curves generated every month from full-frame images alone, automated planet candidate identification has become an attractive alternative to human vetting. Here we present a deep learning model capable of performing triage and vetting on TESS candidates. Our model is modified from an existing neural network designed to automatically classify Kepler candidates, and is the first neural network to be trained and tested on real TESS data. In triage mode, our model can distinguish transit-like signals (planet candidates and eclipsing binaries) from stellar variability and instrumental noise with an average precision (the weighted mean of precisions over all classification thresholds) of 97.0% and an accuracy of 97.4%. In vetting mode, the model is trained to identify only planet candidates with the help of newly added scientific domain knowledge, and achieves an average precision of 69.3% and an accuracy of 97.8%. We apply our model on new data from Sector 6, and present 288 new signals that received the highest scores in triage and vetting and were also identified as planet candidates by human vetters. We also provide a homogeneously classified set of TESS candidates suitable for future training.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 01 Apr 2022 01:20
Last Modified: 13 Apr 2022 00:31
Uncontrolled Keywords: methods: data analysis; planets and satellites: detection; techniques: photometric; Astrophysics - Earth and Planetary Astrophysics
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
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