Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: K2SC: Flexible systematics correction and detrending of K2 light curves
  using Gaussian Process regression   We present K2SC (K2 Systematics Correction), a Python pipeline to model
instrumental systematics and astrophysical variability in light curves from the
K2 mission. K2SC uses Gaussian process regression to model position-dependent
systematics and time-dependent variability simultaneously, enabling the user to
remove both (e.g., for transit searches) or to remove systematics while
preserving variability (for variability studies). For periodic variables, K2SC
automatically computes estimates of the period, amplitude and evolution
timescale of the variability. We apply K2SC to publicly available K2 data from
campaigns 3--5, showing that we obtain photometric precision approaching that
of the original Kepler mission. We compare our results to other publicly
available K2 pipelines, showing that we obtain similar or better results, on
average. We use transit injection and recovery tests to evaluate the impact of
K2SC on planetary transit searches in K2 PDC (Pre-search Data Conditioning)
data, for planet-to-star radius ratios down Rp/Rstar = 0.01 and periods up to P
= 40 d, and show that K2SC significantly improves the ability to distinguish
between correct and false detections, particularly for small planets. K2SC can
be run automatically on many light curves, or manually tailored for specific
objects such as pulsating stars or large amplitude eclipsing binaries. It can
be run on ASCII and FITS light curve files, regardless of their origin. Both
the code and the processed light curves are publicly available, and we provide
instructions for downloading and using them. The methodology used by K2SC will
be applicable to future transit search missions such as TESS and PLATO.

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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: cond-mat
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math
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The categories of this paper are: q-bio