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Found 11 papers, 8 papers with code
Occultation mapping of Io's surface in the near-infrared I: Inferring static maps
Jupiter's moon Io is the most volcanically active body in the Solar System with hundreds of active volcanoes varying in intensity on different timescales.
Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics
starry_process: Interpretable Gaussian processes for stellar light curves
In this note we present the starry_process code, which implements an interpretable Gaussian process (GP) for modeling variability in stellar light curves.
Gaussian Processes
Time Series Analysis
Solar and Stellar Astrophysics
Earth and Planetary Astrophysics
Instrumentation and Methods for Astrophysics
Mapping stellar surfaces I: Degeneracies in the rotational light curve problem
The goal of this paper is twofold: (1) to explore the various degeneracies affecting the stellar light curve "inversion" problem and their effect on what can and cannot be learned from a stellar surface given unresolved photometric measurements; and (2) to motivate ensemble analyses of the light curves of many stars at once as a powerful data-driven alternative to common priors adopted in the literature.
Time Series Analysis
Solar and Stellar Astrophysics
Instrumentation and Methods for Astrophysics
Refining the transit timing and photometric analysis of TRAPPIST-1: Masses, radii, densities, dynamics, and ephemerides
We have collected transit times for the TRAPPIST-1 system with the Spitzer Space Telescope over four years.
Earth and Planetary Astrophysics
Analytic Planetary Transit Light Curves and Derivatives for Stars with Polynomial Limb Darkening
We provide improved analytic expressions for the uniform, linear, and quadratic limb-darkened cases, as well as novel expressions for higher order integer powers of limb darkening.
Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics
EXOFASTv2: A public, generalized, publication-quality exoplanet modeling code
We highlight several potential pitfalls in exoplanet modeling, including the handling of eccentricity in transit-only fits, that the standard exoplanet convention for $\omega$ uses a left-handed coordinate system, contrary to most modern textbooks, how to avoid an important degeneracy when allowing negative companion masses, and a widely unappreciated, potential 10-minute ambiguity in the reported transit times.
Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics
TESS Photometric Mapping of a Terrestrial Planet in the Habitable Zone: Detection of Clouds, Oceans, and Continents
To date, a handful of exoplanets have been photometrically mapped using phase-modulated reflection or emission from their surfaces, but the small amplitudes of such signals have limited previous maps almost exclusively to coarse dipolar features on hot giant planets.
Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics
Detecting Ocean Glint on Exoplanets Using Multiphase Mapping
Retrieving the same longitudinal map at quadrature and crescent phases may be used to tie changes in the apparent albedo with phase back to specific geographic surfaces, although this requires ideal geometries.
Earth and Planetary Astrophysics
Wobble: A Data-driven Analysis Technique for Time-series Stellar Spectra
Here we propose a data-driven method to simultaneously extract precise RVs and infer the underlying stellar and telluric spectra using a linear model (in the log of flux).
Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics Solar and Stellar Astrophysics
An update to the EVEREST K2 pipeline: Short cadence, saturated stars, and Kepler-like photometry down to Kp = 15
On average, EVEREST 2. 0 light curves have 10-20% higher photometric precision than those in the previous version, yielding the highest precision light curves at all Kp magnitudes of any publicly available K2 catalog.
Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics
EVEREST: Pixel Level Decorrelation of K2 Light curves
We present EVEREST, an open-source pipeline for removing instrumental noise from K2 light curves.
Earth and Planetary Astrophysics
