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A Systematic Search for Transiting Planets in the K2 Data

Foreman-Mackey, Daniel and Montet, Benjamin T. and Hogg, David W. and Morton, Timothy D. and Wang, Dun and Schölkopf, Bernhard (2015) A Systematic Search for Transiting Planets in the K2 Data. Astrophysical Journal, 806 (2). Art. No. 215. ISSN 0004-637X.

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Photometry of stars from the K2 extension of NASA's Kepler mission is afflicted by systematic effects caused by small (few-pixel) drifts in the telescope pointing and other spacecraft issues. We present a method for searching K2 light curves for evidence of exoplanets by simultaneously fitting for these systematics and the transit signals of interest. This method is more computationally expensive than standard search algorithms but we demonstrate that it can be efficiently implemented and used to discover transit signals. We apply this method to the full Campaign 1 data set and report a list of 36 planet candidates transiting 31 stars, along with an analysis of the pipeline performance and detection efficiency based on artificial signal injections and recoveries. For all planet candidates, we present posterior distributions on the properties of each system based strictly on the transit observables.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Foreman-Mackey, Daniel0000-0002-9328-5652
Montet, Benjamin T.0000-0001-7516-8308
Hogg, David W.0000-0003-2866-9403
Morton, Timothy D.0000-0002-8537-5711
Additional Information:© 2015 American Astronomical Society. Received 2015 February 16; accepted 2015 May 12; published 2015 June 18. It is a pleasure to thank Eric Agol (UW), Ruth Angus (Oxford), Tom Barclay (Ames), Zach Berta-Thompson (MIT), Daniel Bramich (QEERI, Qatar), Géza Kovács (Konkoly Observatory), Laura Kreidberg (Chicago), Erik Petigura (Berkeley), Roberto Sanchis Ojeda (Berkeley), and Andrew Vanderburg (Harvard) for helpful contributions to the ideas and code presented here. We also thank the anonymous referee for comments that improved the manuscript. D. F. M., D. W. H., and D. W. were partially supported by the National Science Foundation (grant IIS-1124794), the National Aeronautics and Space Administration (grant NNX12AI50G), and the Moore–Sloan Data Science Environment at NYU. B. T. M. was supported by a National Science Foundation Graduate Research Fellowship (grant DGE1144469). This research made use of the NASA Astrophysics Data System and the NASA Exoplanet Archive. The Archive is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program. This paper includes data collected by the Kepler mission. Funding for the Kepler mission is provided by the NASA Science Mission directorate. We are grateful to the entire Kepler team, past and present. Their tireless efforts were all essential to the tremendous success of the mission and the successes of K2, present and future. These data were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST is provided by the NASA Office of Space Science via grant NNX13AC07G and by other grants and contracts. Facility: Kepler - The Kepler Mission
Funding AgencyGrant Number
NYU Moore–Sloan Data Science EnvironmentUNSPECIFIED
NSF Graduate Research FellowshipDGE-1144469
Subject Keywords:catalogs; methods: data analysis; methods: statistical; planetary systems; stars: statistics
Issue or Number:2
Record Number:CaltechAUTHORS:20150804-110004560
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Official Citation:A Systematic Search for Transiting Planets in the K2 Data Daniel Foreman-Mackey et al. 2015 ApJ 806 215
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59174
Deposited By: Ruth Sustaita
Deposited On:04 Aug 2015 20:00
Last Modified:09 Mar 2020 13:19

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