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The two CCD photometries of the intermediate polar TV Columbae are made for obtaining the two updated eclipse timings with high precision. There is an interval time \sim 17yr since the last mid-eclipse time observed in 1991. Thus, the new…

Solar and Stellar Astrophysics · Physics 2010-07-26 Zhibin Dai , Shengbang Qian , Eduardo Fernández Lajús , G. L. Baume

Eleven transit light curves for the exoplanet WASP-140b were studied with the primary objective to investigate the possibility of transit timing variations (TTVs). Previously unstudied MicroObservatory and Las Cumbres Global Telescope…

Earth and Planetary Astrophysics · Physics 2022-09-23 Allen North , Timothy Banks

Photometric follow-ups of transiting exoplanets may lead to discoveries of additional, less massive bodies in extrasolar systems. This is possible by detecting and then analysing variations in transit timing of transiting exoplanets. We…

Earth and Planetary Astrophysics · Physics 2015-05-19 G. Maciejewski , D. Dimitrov , R. Neuhaeuser , A. Niedzielski , St. Raetz , Ch. Ginski , Ch. Adam , C. Marka , M. Moualla , M. Mugrauer

We present precise new V, I, and K-band photometry for the planetary transit candidate star OGLE-TR-82. Good seeing V-band images acquired with VIMOS instrument at ESO VLT allowed us to measure V=20.6+-0.03 mag star in spite of the presence…

We present a new data set of transit observations of the TrES-2b exoplanet taken in spring 2009, using the 1.2m Oskar-Luhning telescope (OLT) of Hamburg Observatory and the 2.2m telescope at Calar Alto Observatory using BUSCA (Bonn…

Earth and Planetary Astrophysics · Physics 2015-05-14 D. Mislis , S. Schroter , J. H. M. M. Schmitt , O. Cordes , K. Reif

Precise physical properties of the known transiting exoplanets are essential for their precise atmospheric characterization using modern and upcoming instruments. Leveraging the large volume of high SNR photometric follow-up data from TESS,…

Earth and Planetary Astrophysics · Physics 2025-11-25 Suman Saha

Kepler-9, discovered by Holman et al. 2010, was the first system with multiple confirmed transiting planets and the first system to clearly show long-anticipated transit timing variations (TTVs). We review the historical circumstances…

Earth and Planetary Astrophysics · Physics 2019-05-14 Darin Ragozzine , Matthew J. Holman

Transit timing variations provide a powerful tool for confirming and characterizing transiting planets, as well as detecting non-transiting planets. We report the results an updated TTV analysis for 1481 planet candidates (Borucki et al.…

Transit Timing Variations (TTVs) can be induced by a range of physical phenomena, including planet-planet interactions, planet-moon interactions, and stellar activity. Recent work has shown that roughly half of moons would induce fast TTVs…

The Transit Timing Variation (TTV) method relies on monitoring changes in timing of transits of known exoplanets. Non-transiting planets in the system can be inferred from TTVs by their gravitational interaction with the transiting planet.…

Earth and Planetary Astrophysics · Physics 2015-05-14 David Nesvorny , Cristian Beauge

Transiting planets are essential to study the structure and evolution of extra-solar planets. For that purpose, it is important to measure precisely the radius of these planets. Here we report new high-accuracy photometry of the transits of…

We refined the ephemeris of seven transiting exoplanets HAT-P-6b, HAT-P-12b, HAT-P-18b, HAT-P-22b, HAT-P-32b, HAT-P-33b, and HAT-P-52b. We observed 11 transits from eight observatories in different filters for HAT-P-6b and HAT-P-32b. Also,…

We study the long-term time-scale (i.e. period comaprable to the orbital period of the outer perturber object) transit timing variations in transiting exoplanetary systems which contain a further, more distant (a_2>>a_1) either planetary,…

Earth and Planetary Astrophysics · Physics 2015-05-20 Tamás Borkovits , Szilárd Csizmadia , Emese Forgács-Dajka , Tibor Hegedüs

We identify targets in the Kepler field that may be characterized by transit timing variations (TTVs) and are detectable by the Transiting Exoplanet Survey Satellite (TESS). Despite the reduced signal-to-noise ratio of TESS transits…

Earth and Planetary Astrophysics · Physics 2022-07-20 Daniel Jontof-Hutter , Paul A. Dalba , John H. Livingston

Transit Timing Variations (TTVs) are a powerful tool for detecting unseen companions in systems with known transiting exoplanets and for characterizing their masses and orbital properties. Large-scale and homogeneous TTV analyses are a…

Earth and Planetary Astrophysics · Physics 2026-01-14 Luca Naponiello

The transiting extrasolar planet WASP-12 b was found to be one of the most intensely irradiated exoplanets. It is unexpectedly bloated and is losing mass that may accrete into the host star. Our aim was to refine the parameters of this…

Earth and Planetary Astrophysics · Physics 2015-05-27 G. Maciejewski , R. Errmann , St. Raetz , M. Seeliger , I. Spaleniak , R. Neuhaeuser

Inferring planetary parameters from transit timing variations is challenging for small exoplanets because their transits may be so weak that determination of individual transit timing is difficult or impossible. We implement a useful…

Earth and Planetary Astrophysics · Physics 2021-02-24 Gideon Yoffe , Aviv Ofir , Oded Aharonson

We perform an analysis of ~80000 photometric measurements for the following 10 stars hosting transiting planets: WASP-2, -4, -5, -52, Kelt-1, CoRoT-2, XO-2, TrES-1, HD 189733, GJ 436. Our analysis includes mainly transit lightcurves from…

Studies of transiting extrasolar planets offer an unique opportunity to get to know the internal structure of those worlds. The transiting exoplanet XO-5 b was found to have an anomalously high Safronov number and surface gravity. Our aim…

Earth and Planetary Astrophysics · Physics 2011-03-08 G. Maciejewski , M. Seeliger , Ch. Adam , St. Raetz , R. Neuhaeuser

We present four new transits of the planetary system TrES-3 observed between 2009 May and 2010 June. Among these, the third transit by itself indicates possible evidence for brightness disturbance, which might be the result of the planet…

Earth and Planetary Astrophysics · Physics 2015-05-20 Jae Woo Lee , Jae-Hyuck Youn , Seung-Lee Kim , Chung-Uk Lee , Jae-Rim Koo
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