Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: TESS Revisits WASP-12: Updated Orbital Decay Rate and Constraints on
  Atmospheric Variability   After observing WASP-12 in the second year of the primary mission, the
Transiting Exoplanet Survey Satellite (TESS) revisited the system in late 2021
during its extended mission. In this paper, we incorporate the new TESS
photometry into a reanalysis of the transits, secondary eclipses, and phase
curve. We also present a new $K_s$-band occultation observation of WASP-12b
obtained with the Palomar/Wide-field Infrared Camera instrument. The latest
TESS photometry spans three consecutive months, quadrupling the total length of
the TESS WASP-12 light curve and extending the overall time baseline by almost
two years. Based on the full set of available transit and occultation timings,
we find that the orbital period is shrinking at a rate of $-29.81 \pm 0.94$ ms
yr$^{-1}$. The additional data also increase the measurement precision of the
transit depth, orbital parameters, and phase-curve amplitudes. We obtain a
secondary eclipse depth of $466 \pm 35$ ppm, a $2\sigma$ upper limit on the
nightside brightness of 70 ppm, and a marginal $6\overset{\circ}{.}2 \pm
2\overset{\circ}{.}8$ eastward offset between the dayside hotspot and the
substellar point. The voluminous TESS dataset allows us to assess the level of
atmospheric variability on timescales of days, months, and years. We do not
detect any statistically significant modulations in the secondary eclipse depth
or day-night brightness contrast. Likewise, our measured $K_s$-band occultation
depth of $2810 \pm 390$ ppm is consistent with most $\sim$2.2 $\mu$m
observations in the literature.

18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
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The categories of this paper are: eess