Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exoplanet System Kepler-2 with comparisons to Kepler-1 and 13   We have carried out an intensive study of photometric (Kepler Mission) and
spectroscopic data on the system Kepler-2 (HAT-P-7A) using the dedicated
software WinFitter. The mean individual data-point error of the normalized flux
values for this system is 0.00015, leading to the model's specification for the
mean reference flux to an accuracy of $\sim$0.5 ppm. This testifies to the
remarkably high accuracy of the binned data-set, derived from over 1.8 million
individual observations. Spectroscopic data are reported with the similarly
high-accuracy radial velocity amplitude measure of $\sim$2 m s$^{-1}$. The
analysis includes discussion of the fitting quality and model adequacy. Our
derived absolute parameters for Kepler-2 are as follows: $M_p$ (Jupiter) 1.80
$\pm$ 0.13; $R_{\star}$ 1.46 $\pm 0.08 \times 10^6$ km; $R_p$ 1.15 $\pm 0.07
\times 10^5$ km. These values imply somewhat larger and less condensed bodies
than previously catalogued, but within reasonable error estimates of such
literature parameters. We find also tidal, reflection and Doppler effect
parameters, showing that the optimal model specification differs slightly from
a `cleaned' model that reduces the standard deviation of the $\sim$3600 binned
light curve points to less than 0.9 ppm. We consider these slight differences,
making comparisons with the hot-jupiter systems Kepler-1 (TrES-2) and 13.

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The categories of this paper are: gr-qc
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: econ