Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2K046

Transit Timing Variations of TrES-2: a combined analysis of ground- and space-based photometry

Raetz, St. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Ginski, Ch. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Mugrauer, M. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Berndt, A. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Eisenbeiss, T. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Adam, Ch. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Raetz, M. (Private observatory Raetz, Stiller Berg 6, 98587 Herges-Hallenberg, Germany)
Roell, T. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Seeliger, M. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Maciejewski, G. (Centre for Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland)
Marka, C. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Vanko, M. (Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatransk´a Lomnica, Slovakia)
Bukowiecki, L. (Centre for Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland)
Errmann, R. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany, Abbe Center of Photonics, Max-Wien-Platz 1, 07743 Jena, Germany)
Kitze, M. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Ohlert, J. (Michael-Adrian-Observatorium, Astronomie-Stiftung Trebur, Fichtenstrasse 7, D-65468 Trebur, Germany, University of Applied Sciences, Technische Hochschule Mittelhessen, Friedberg, Germany)
Pribulla, T. (Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatransk´a Lomnica, Slovakia)
Schmidt, J. G. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Sebastian, D. (Thüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany)
Tetzlaff, N. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Hohle, M. M. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Schmidt, T. O. B. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)
Neuhäuser, R. (Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, D-07745 Jena, Germany)

Abstract:
TrES-2 is one of the few exoplanets, which offer the matchless possibility to combine long-term ground-based observations with continuous satellite data. TrES-2 is a target of our \"Transit Timing Variations @ YETI\" (TTV@YETI) project which is dedicated to detect and characterize signals of transit timing variations. We observed 43 ground-based light curves of 30 individual transit events of TrES-2. We used seven 0.2 - 2.2m telescopes located at five observatories in Germany and Spain. In addition, we analyzed 16 quarters (Q0-Q15) of observational data from NASA’s space telescope Kepler including 424 individual transit events. The continuous monitoring of Kepler allows to determine the system parameters of each of the 424 transits and search for possible changes of these quantities. Here we present a first indication of an increasing stellar activity of the TrES-2 host star and provide new limits on possible transit timing variations.

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