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.
@article{arxiv.1308.6574,
title = {A hot Jupiter transiting a mid-K dwarf found in the pre-OmegaCam Transit Survey},
author = {J. Koppenhoefer and R. P. Saglia and L. Fossati and Y. Lyubchik and M. Mugrauer and R. Bender and C. -H. Lee and A. Riffeser and P. Afonso and J. Greiner and Th. Henning and R. Neuhäuser and I. A. G. Snellen and Y. Pavlenko and M. Verdugo and N. Vogt},
journal= {arXiv preprint arXiv:1308.6574},
year = {2015}
}
Comments
18 pages, 23 figures, accepted for publication in MNRAS