Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Analysis of Transiting Hot Jupiters Observed with K2: WASP-55b and
  WASP-75b   We present our analysis of the K2 short-cadence data of two previously known
hot Jupiter exoplanets: WASP-55b and WASP-75b. The high precision of the K2
lightcurves enabled us to search for transit timing and duration variations,
rotational modulation, starspots, phase-curve variations and additional
transiting planets. We identified stellar variability in the WASP-75 lightcurve
which may be an indication of rotational modulation, with an estimated period
of $11.2\pm1.5$ days. We combined this with the spectroscopically measured
$v\sin(i_*)$ to calculate a possible line of sight projected inclination angle
of $i_*=41\pm16^{\circ}$. We also perform a global analysis of K2 and
previously published data to refine the system parameters.

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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg