New transit observations for HAT-P-30 b, HAT-P-37 b, TrES-5 b, WASP-28 b, WASP-36 b, and WASP-39 b

TL;DR

This study provides new transit observations for six exoplanets, refining their orbital parameters and transit timings, and confirms the stability of their transit signals over time.

Contribution

The paper presents new transit data for six exoplanets, improving the precision of their orbital parameters and transit ephemerides using homogeneous analysis.

Findings

Refined orbital periods with 2-7 times lower uncertainties

No detectable transit timing variations

Results consistent with previous studies

Abstract

We present new transit light curves for planets in six extrasolar planetary systems. They were acquired with 0.4-2.2 m telescopes located in west Asia, Europe, and South America. When combined with literature data, they allowed us to redetermine system parameters in a homogeneous way. Our results for individual systems are in agreement with values reported in previous studies. We refined transit ephemerides and reduced uncertainties of orbital periods by a factor between 2 and 7. No sign of any variations in transit times was detected for the planets studied.