New transit timing observations for GJ 436 b, HAT-P-3 b, HAT-P-19 b, WASP-3 b, and XO-2 b

TL;DR

This study reports new transit observations for five hot exoplanets, extending their observational timeline and refining their transit ephemerides, with all data aligning with linear models.

Contribution

Provides updated transit timings for five exoplanets, improving ephemeris accuracy and confirming linear orbital behavior.

Findings

All new transits are consistent with linear ephemerides.

Extended observational timespan enhances transit timing precision.

Refined orbital parameters for the studied exoplanets.

Abstract

We present new transit observations acquired between 2014 and 2018 for the hot exoplanets GJ 436 b, HAT-P-3 b, HAT-P-19 b, WASP-3 b, and XO-2 b. New mid-transit times extend the timespan covered by observations of these exoplanets and allow us to refine their transit ephemerides. All new transits are consistent with linear ephemerides.