Planetary candidates observed by Kepler iv: Planet sample from Q1-Q8 (22 months)

Christopher J. Burke, Stephen T. Bryson, F. Mullally, Jason F. Rowe, Jessie L. Christiansen, Susan E. Thompson, Jeffrey L. Coughlin, Michael R. Haas, Natalie M. Batalha, Douglas A. Caldwell, Jon M. Jenkins, Martin Still, Thomas Barclay, William J. Borucki, William J. Chaplin, David R. Ciardi, Bruce D. Clarke, William D. Cochran, Brice Olivier Demory, Gilbert A. EsquerdoThomas N. Gautier, Ronald L. Gilliland, Forrest R. Girouard, Mathieu Havel, Christopher E. Henze, Steve B. Howell, Daniel Huber, David W. Latham, Jie Li, Robert C. Morehead, Timothy D. Morton, Joshua Pepper, Elisa Quintana, Darin Ragozzine, Shawn E. Seader, Yash Shah, Avi Shporer, Peter Tenenbaum, Joseph D. Twicken, Angie Wolfgang

Research output: Contribution to journalArticlepeer-review

203 Scopus citations


We provide updates to the Kepler planet candidate sample based upon nearly two years of high-precision photometry (i.e., Q1-Q8). From an initial list of nearly 13,400 threshold crossing events, 480 new host stars are identified from their flux time series as consistent with hosting transiting planets. Potential transit signals are subjected to further analysis using the pixel-level data, which allows background eclipsing binaries to be identified through small image position shifts during transit. We also re-evaluate Kepler Objects of Interest (KOIs) 1-1609, which were identified early in the mission, using substantially more data to test for background false positives and to find additional multiple systems. Combining the new and previous KOI samples, we provide updated parameters for 2738 Kepler planet candidates distributed across 2017 host stars. From the combined Kepler planet candidates, 472 are new from the Q1-Q8 data examined in this study. The new Kepler planet candidates represent 40% of the sample with R P 1 R ⊕ and represent 40% of the low equilibrium temperature (T eq < 300 K) sample. We review the known biases in the current sample of Kepler planet candidates relevant to evaluating planet population statistics with the current Kepler planet candidate sample.

Original languageEnglish (US)
Article number19
JournalAstrophysical Journal, Supplement Series
Issue number2
StatePublished - Feb 2014

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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