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Measuring Transit Signal Recovery in the Kepler Pipeline. III. Completeness of the Q1–Q17 DR24 Planet Candidate Catalogue with Important Caveats for Occurrence Rate Calculations

Christiansen, Jessie L. and Clarke, Bruce D. and Burke, Christopher J. and Jenkins, Jon M. and Bryson, Stephen T. and Coughlin, Jeffrey L. and Mullally, Fergal and Thompson, Susan E. and Twicken, Joseph D. and Batalha, Natalie M. and Haas, Michael R. and Catanzarite, Joseph and Campbell, Jennifer R. and Uddin, Akm Kamal and Zamudio, Khadeejah and Smith, Jeffrey C. and Henze, Christopher E. (2016) Measuring Transit Signal Recovery in the Kepler Pipeline. III. Completeness of the Q1–Q17 DR24 Planet Candidate Catalogue with Important Caveats for Occurrence Rate Calculations. Astrophysical Journal, 828 (2). Art. No. 99. ISSN 0004-637X.

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With each new version of the Kepler pipeline and resulting planet candidate catalog, an updated measurement of the underlying planet population can only be recovered with a corresponding measurement of the Kepler pipeline detection efficiency. Here we present measurements of the sensitivity of the pipeline (version 9.2) used to generate the Q1–Q17 DR24 planet candidate catalog. We measure this by injecting simulated transiting planets into the pixel-level data of 159,013 targets across the entire Kepler focal plane, and examining the recovery rate. Unlike previous versions of the Kepler pipeline, we find a strong period dependence in the measured detection efficiency, with longer (>40 day) periods having a significantly lower detectability than shorter periods, introduced in part by an incorrectly implemented veto. Consequently, the sensitivity of the 9.2 pipeline cannot be cast as a simple one-dimensional function of the signal strength of the candidate planet signal, as was possible for previous versions of the pipeline. We report on the implications for occurrence rate calculations based on the Q1–Q17 DR24 planet candidate catalog, and offer important caveats and recommendations for performing such calculations. As before, we make available the entire table of injected planet parameters and whether they were recovered by the pipeline, enabling readers to derive the pipeline detection sensitivity in the planet and/or stellar parameter space of their choice.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Christiansen, Jessie L.0000-0002-8035-4778
Jenkins, Jon M.0000-0002-4715-9460
Coughlin, Jeffrey L.0000-0003-1634-9672
Thompson, Susan E.0000-0001-7106-4683
Additional Information:© 2016 The American Astronomical Society. Received 2016 February 17; revised 2016 April 8; accepted 2016 May 2; published 2016 September 8. Funding for the Kepler Discovery Mission is provided by NASA's Science Mission Directorate. The authors acknowledge the efforts of the Kepler Mission team for obtaining the calibrated pixels, light curves, and data validation diagnostics data used in this publication. These data products were generated by the Kepler Mission science pipeline through the efforts of the Kepler Science Operations Center and Science Office. The Kepler Mission is lead by the project office at NASA Ames Research Center. Ball Aerospace built the Kepler photometer and spacecraft, which is operated by the mission operations center at LASP. These data products are archived at the Mikulski Archive for Space Telescopes and the NASA Exoplanet Archive. J.L.C. is supported by NASA under award No. GRNASM99G000001.
Funding AgencyGrant Number
Subject Keywords:methods: data analysis – techniques: photometric
Issue or Number:2
Record Number:CaltechAUTHORS:20161021-144355575
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Official Citation:Jessie L. Christiansen et al 2016 ApJ 828 99
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71361
Deposited By: Tony Diaz
Deposited On:21 Oct 2016 21:51
Last Modified:09 Mar 2020 13:18

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