Browsing by Subject "Techniques: photometric"

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    Looking for timing variations in the transits of 16 exoplanets
    (Oxford University Press, 2024-04-05) Yalcinkaya, S.; Esmer, E. M.; Basturk, O.; Muhaymin, A.; Kutluay, A. C.; Silistre, D. I.; Akar, F.; Southworth, J.; Mancini, L.; Davoudi, F.; Karamanli, E.; Tezcan, F.; Demir, E.; Yilmaz, D.; Guleroglu, E.; Tekin, M.; Taskin, I.; Aladag, Y.; Sertkan, E.; Kurt, U. Y.; Fisek, S.; Kaptan, S.; Alis, S.; Aksaker, N.; Yelkenci, F. K.; Tezcan, C. T.; Kaya, A.; Oglakkaya, D.; Aydin, Z. S.; Yesilyaprak, C.
    We update the ephemerides of 16 transiting exoplanets using our ground-based observations, new Transiting Exoplanet Survey Satellite data, and previously published observations including those of amateur astronomers. All these light curves were modelled by making use of a set of quantitative criteria with the exofast code to obtain mid-transit times. We searched for statistically significant secular and/or periodic trends in the mid-transit times. We found that the timing data are well modelled by a linear ephemeris for all systems except for XO-2 b, for which we detect an orbital decay with the rate of -12.95 +/- 1.85 ms yr(-1) that can be confirmed with future observations. We also detect a hint of potential periodic variations in the transit timing variation data of HAT-P-13 b, which also requires confirmation with further precise observations.