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Catalog of New K2 Exoplanet Candidates from Citizen Scientists

Zink, Jon K. and Hardegree-Ullman, Kevin K. and Christiansen, Jessie L. and Petigura, Erik A. and Ciardi, David R. (2019) Catalog of New K2 Exoplanet Candidates from Citizen Scientists. Research Notes of the AAS, 3 (2). Art. No. 43. ISSN 2515-5172. doi:10.3847/2515-5172/ab0a02.

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The K2 mission has successfully found ≈1000 new exoplanet candidates.12 Now with an enormous data set (≈400,000 stellar targets) that nearly doubles the source count of Kepler (Huber et al. 2016), data parsing provides a unique time intensive obstacle. The Exoplanet Explorers13 project, part of the Zooniverse platform, allows citizen scientists to help overcome the abundance of transit data (Christiansen et al. 2018). We make available 204,855 statistically significant dips in K2 light curves from campaigns 0–8, 10, and 12–14. We used the k2phot pipeline (Petigura et al. 2018) to remove the K2 systematics and searched for periodic transits using the TERRA search algorithm (Petigura et al. 2013). For training, each participant is shown an example of a real folded exoplanet transit light curve, with the expected model plotted over the data. The volunteer is then instructed to look for dips that provide a similar match to this basic transit model. Each folded light curve presented are assigned a "Yes" or "No" value by the citizen scientist, indicating their belief that the source of the dip is caused by a transiting exoplanet. This simple visual inspection helps create a targeted search of the K2 light curves.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Zink, Jon K.0000-0003-1848-2063
Hardegree-Ullman, Kevin K.0000-0003-3702-0382
Christiansen, Jessie L.0000-0002-8035-4778
Petigura, Erik A.0000-0003-0967-2893
Ciardi, David R.0000-0002-5741-3047
Additional Information:© 2019. The American Astronomical Society. Received 2019 February 20. Accepted 2019 February 22. Published 2019 February 28. We thank all of the 21,770 volunteers who have helped classify transits via Exoplanet Explorers. The following users were unable to be contacted, but also provided early classifications: Cleaver82, DarylW, garryway, GeorgeHolbrook, Grayzer56, Ianbourns, jgraber, krbethune, miguelgambler, mwalden, mzslashx, Or2dee2, sona25, swiese, Toncent, and willedwards45. This publication uses data generated via the platform, development of which is funded by generous support, including a Global Impact Award from Google, and by a grant from the Alfred P. Sloan Foundation. This research has made use of the Exoplanet Follow-up Observation Program website and the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Alfred P. Sloan FoundationUNSPECIFIED
Subject Keywords:planets and satellites: detection
Issue or Number:2
Record Number:CaltechAUTHORS:20190301-090215424
Persistent URL:
Official Citation:Jon K. Zink et al 2019 Res. Notes AAS 3 43
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93383
Deposited By: George Porter
Deposited On:01 Mar 2019 17:32
Last Modified:16 Nov 2021 16:57

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