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arXiv · 1308.6574

A hot Jupiter transiting a mid-K dwarf found in the pre-OmegaCam Transit Survey

J. Koppenhoefer·R. P. Saglia·L. Fossati·Y. Lyubchik·M. Mugrauer·R. Bender·C. -H. Lee·A. Riffeser·P. Afonso·J. Greiner·Th. Henning·R. Neuhäuser·I. A. G. Snellen·Y. Pavlenko·M. Verdugo·N. Vogt
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Abstract

We describe the pre-OmegaTranS project, a deep survey for transiting extra-solar planets in the Carina region of the Galactic Disk. In 2006-2008 we observed a single dense stellar field with a very high cadence of ~2min using the ESO Wide Field Imager at the La Silla Observatory. Using the Astronomical Wide-field System for Europe and the Munich Difference Imaging Analysis pipeline, a module that has been developed for this project, we created the light curves of 16000 stars with more than 4000 data points which we searched for periodic transit signals using a box-fitting least-squares detection algorithm. All light curves are publicly available. In the course of the pre-OmegaTranS project we identified two planet candidates - POTS-1b and POTS-C2b - which we present in this work. With extensive follow-up observations we were able to confirm one of them, POTS-1b, a hot Jupiter transiting a mid-K dwarf. The planet has a mass of 2.31+-0.77M_Jup and a radius of 0.94+-0.04R_Jup and a period of P=3.16d. The host star POTS-1 has a radius of 0.59+-0.02R_Sun and a mass of 0.70+-0.05M_Sun. Due to its low apparent brightness of I=16.1mag the follow-up and confirmation of POTS-1b was particularly challenging and costly.

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J. Koppenhoefer, R. P. Saglia, L. Fossati, Y. Lyubchik, M. Mugrauer, R. Bender, C. -H. Lee, A. Riffeser, P. Afonso, J. Greiner, Th. Henning, R. Neuhäuser, I. A. G. Snellen, Y. Pavlenko, M. Verdugo, N. Vogt. 2013-08-29. A hot Jupiter transiting a mid-K dwarf found in the pre-OmegaCam Transit Survey. https://doi.org/10.1093/mnras/stt1512

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