Planetary transit observations at the University Observatory Jena: XO-1b and TrES-1

Abstract

We report on observations of transit events of the transiting planets XO-1b and TrES-1 with a 25 cm telescope of the University Observatory Jena. With the transit timings for XO-1b from all 50 available XO, SuperWASP, Transit Light Curve (TLC)-Project- and Exoplanet Transit Database (ETD)-data, including our own I-band photometry obtained in March 2007, we find that the orbital period is P= (3.941501 +/- 0.000001) d, a slight change by ~3 s compared to the previously published period. We present new ephemeris for this transiting planet. Furthermore, we present new R-band photometry of two transits of TrES-1. With the help of all available transit times from literature this allows us to refine the estimate of the orbital period: P=(3.0300722 +/- 0.0000002) d. Our observations will be useful for future investigations of timing variations caused by additional perturbing planets and/or stellar spots and/or moons.

7 pages, 7 figures, 5 tables, accepted for publication in AN

References in corpus (9)

• Detection of Thermal Emission from an Extrasolar Planet
• TrES-1: The Transiting Planet of a Bright K0V Star
• The Transit Light Curve (TLC) Project. I. Four Consecutive Transits of the Exoplanet XO-1b
• A Transiting Planet of a Sun-like Star
• The Transit Light Curve Project. III. Tres Transits of TrES-1
• Using Transit Timing Observations to Search for Trojans of Transiting Extrasolar Planets
• SuperWASP Observations of the Transiting Extrasolar planet XO-1b
• Searching for transit timing variations in transiting exoplanet systems
• Detecting and Characterizing Planetary Systems with Transit Timing

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• HAT-P-65b and HAT-P-66b: Two Transiting Inflated Hot Jupiters and Observational Evidence for the Re-Inflation of Close-In Giant Planets
• ExoClock project II: A large-scale integrated study with 180 updated exoplanet ephemerides
• NICMOS Observations of the Transiting Hot Jupiter XO-1b
• Transit timing analysis of the exoplanets TrES-1 and TrES-2
• Follow-up photometry of TrES-3
• Directed follow-up strategy of low-cadence photometric surveys in Search of Transiting Exoplanets - II. application to Gaia
• Physical properties and optical-infrared transmission spectrum of the giant planet XO-1b
• TrES-1 b: A Case Study in Detecting Secular Evolution of Exoplanet Orbits