TOI-1458, 1516, 2046 TTVs from ADYU60, T100, TESS

Ground-based data were collected in the 2020-2024 time span with the 0.6m telescope (ADYU60) located at the Adiyaman University Application and Research Center (Adiyaman, Turkiye) and the 1.0m telescope at the Turkiye National Observatory (TUG, Turkiye).

Through a combination of fits to our ground-based data, the midtransit times data from TESS, and additional data taken from the literature, we present an updated linear ephemeris for each system. Transit timing variations (TTVs) were analyzed using linear, orbital decay, and apsidal precession models. The resulting BIC({Delta}BIC) values indicate that the orbital decay model is statistically favored for HAT-P-16b and TOI-1516b, while the constant period model is preferred for TOI-2046b.