Parameters of Recent Transits of HAT-P-23b

TL;DR

This study observed four transits of HAT-P-23b, combining light curves to refine key system parameters and orbital period, using Monte Carlo modeling with data from a small telescope.

Contribution

It provides updated and more precise measurements of HAT-P-23b's physical and orbital parameters based on new transit observations and modeling.

Findings

Refined planet-to-star radius ratio to 0.1105

Improved orbital period to 1.2128868 days

Derived system inclination of 87.9 degrees

Abstract

Four transits of the exoplanet HAT-P-23b were recently observed with the 0.36m telescope at the Universidad de Monterrey Observatory. The four light curves were successfully combined to obtain a resulting one with reduced scattering per bin. This one was modeled using a Monte Carlo method to obtain the essential parameters that characterize the system. Assuming orbital parameters such as eccentricity, e, and longitude of periastron, w, from the discovery paper, we found values of Rp/R* = 0.1105 +0.0015-0.0013 for the planet-to-star radius ratio, a/R* = 4.23 +0.06-0.12 for the scaled semimajor axis, and an orbital inclination of the system of i = 87.9d +1.5-2.2. We also derive an improved orbital period of 1.2128868 +- 0.0000004 days (To = 2,454,852.26542 +- 0.00018 BJD_TDB) for the system.