Transit modeling of WASP-43b

Year, pages: 2019, 551 - 555

The goal of this project was to learn how to estimate basic pro-perties of a transiting exoplanet from ground-based transit photometry. We analysed a photometric time series of a single WASP-43b transit. Data reduction was carried out using a custom-built aperture photometry pipeline written in Python, while a custom light-curve modelling code based on PyTransit was used for parameter estimation. We obtained a transit time centre T₀=2 458 168.0862±0.0001, a radius ratio R_p/R_★=0.121±0.004 and an impact parameter b=0.71±0.06. We compared our results with literature and found agreement within 3 σ for almost parameters. The two exceptions were the time of the transit centre, T₀, and the radius ratio, both with significant discrepancy. We believe the T₀ discrepancy is due to the bad accuracy of the period and/or T₀ values, while the radius ratio discrepancy could be due to systematics that were not accounted sufficiently by the linear baseline model used in the transit modelling.

Maimone, M., Tinaut-Ruano, F., Różański, T., Parviainen, H. 2019. Transit modeling of WASP-43b. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 49, no.3, pp. 551-555. 1335-1842.

Maimone, M., Tinaut-Ruano, F., Różański, T., Parviainen, H. (2019). Transit modeling of WASP-43b. Contributions of the Astronomical Observatory Skalnaté Pleso, 49(3), 551-555. 1335-1842.

Publisher: Astronomical Institute, Slovak Academy of Sciences

This work is licensed under a Creative Commons Attribution 4.0 International License.