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

✍ Scribed by St. Raetz; M. Mugrauer; T.O.B. Schmidt; T. Roell; T. Eisenbeiss; M.M. Hohle; N. Tetzlaff; M. Vaňko; A. Seifahrt; Ch. Broeg; J. Koppenhoefer; R. Neuhäuser

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 455 KB
• Volume: 330
• Category: Article
• ISSN: 0004-6337
• DOI: 10.1002/asna.200811200

✦ Synopsis

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 (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)