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- W3100619052 abstract "Several studies have shown that stellar activity features, such as occulted and non-occulted starspots, can affect the measurement of transit parameters biasing studies of transit timing variations and transmission spectra. We present PyTranSpot , which we designed to model multiband transit light curves showing starspot anomalies, inferring both transit and spot parameters. The code follows a pixellation approach to model the star with its corresponding limb darkening, spots, and transiting planet on a two dimensional Cartesian coordinate grid. We combine PyTranSpot with a Markov chain Monte Carlo framework to study and derive exoplanet transmission spectra, which provides statistically robust values for the physical properties and uncertainties of a transiting star-planet system. We validate PyTranSpot ’s performance by analyzing eleven synthetic light curves of four different star-planet systems and 20 transit light curves of the well-studied WASP-41b system. We also investigate the impact of starspots on transit parameters and derive wavelength dependent transit depth values for WASP-41b covering a range of 6200−9200 Å, indicating a flat transmission spectrum." @default.
- W3100619052 created "2020-11-23" @default.
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- W3100619052 date "2018-02-01" @default.
- W3100619052 modified "2023-10-05" @default.
- W3100619052 title "PyTranSpot: A tool for multiband light curve modeling of planetary transits and stellar spots" @default.
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- W3100619052 doi "https://doi.org/10.1051/0004-6361/201731345" @default.
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