2018A&A...610A..15J


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST17:58:05

2018A&A...610A..15J - Astronomy and Astrophysics, volume 610A, 15-15 (2018/2-1)

PyTranSpot: A tool for multiband light curve modeling of planetary transits and stellar spots.

JUVAN I.G., LENDL M., CUBILLOS P.E., FOSSATI L., TREGLOAN-REED J., LAMMER H., GUENTHER E.W. and HANSLMEIER A.

Abstract (from CDS):

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 6200-9200Å, indicating a flat transmission spectrum.

Abstract Copyright: © ESO, 2018

Journal keyword(s): planetary systems - planets and satellites: individual: WASP-41b - planets and satellites: fundamental parameters - starspots - techniques: photometric

Status at CDS:  

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 WASP-41 * 12 42 28.4949324021 -30 38 23.527612553   12.36 11.63 11.39 10.78 G8V 38 1
2 WASP-41b Pl 12 42 28.4949324021 -30 38 23.527612553           ~ 27 1

    Equat.    Gal    SGal    Ecl

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2020.06.02-17:58:05

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