Scaling K2. IV. A Uniform Planet Sample for Campaigns 1-8 and 10-18
J. K. Zink, K. K. Hardegree-Ullman, J. L. Christiansen, S. Bhure, B., Duffy Adkins, E. A. Petigura, C. D. Dressing, I. J. M. Crossfield, J. E., Schlieder

TL;DR
This paper presents the first homogeneous, automated catalog of 747 K2 transiting exoplanet candidates from Campaigns 1-8 and 10-18, enabling robust demographic analysis with quantified completeness and reliability.
Contribution
It introduces an automated procedure for constructing a uniform exoplanet candidate catalog from K2 data, including new candidates and reliability assessments.
Findings
747 planet candidates identified, including 366 new ones
Maximum detection completeness of 61% due to data detrending
Estimated 91% reliability of candidates, rising to 94% for FGKM dwarfs
Abstract
We provide the first full K2 transiting exoplanet sample, using photometry from Campaigns 1-8 and 10-18, derived through an entirely automated procedure. This homogeneous planet candidate catalog is a crucial to perform a robust demographic analysis of transiting exoplanets with K2. We identify 747 unique planet candidates and 57 multi-planet systems. Of these candidates, 366 have not been previously identified, including one resonant multi-planet system and one system with two short-period gas giants. By automating the construction of this list, measurements of sample biases (completeness and reliability) can be quantified. We carried out a light curve-level injection/recovery test of artificial transit signals and found a maximum completeness of 61%, a consequence of the significant detrending required for K2 data analysis. Through this operation we attained measurements of the…
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