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Ephemeris refinement of 21 Hot Jupiter exoplanets with high timing uncertainties

Mallonn, M.; von Essen, C.; Herrero, E.; Alexoudi, T.; Granzer, T.; Sosa, M.; Strassmeier, K. G.; Bakos, G.; Bayliss, D.; Brahm, R.; Bretton, M.; Campos, F.; Carone, L.; Colón, K. D.; Dale, H. A.; Dragomir, D.; Espinoza, N.; Evans, P.; Garcia, F.; Gu, S.-H.; Guerra, P.; Jongen, Y.; Jordán, A.; Kang, W.; Keles, E.; Kim, T.; Lendl, M.; Molina, D.; Salisbury, M.; Scaggiante, F.; Shporer, A.; Siverd, R.; Sokov, E.; Sokova, I. and Wünsche, A. (2019). Ephemeris refinement of 21 Hot Jupiter exoplanets with high timing uncertainties. Astronomy & Astrophysics, 622, article no. A81.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1051/0004-6361/201834194
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Abstract

Transit events of extrasolar planets offer a wealth of information for planetary characterization. However, for many known targets, the uncertainty of their predicted transit windows prohibits an accurate scheduling of follow-up observations. In this work, we refine the ephemerides of 21 Hot Jupiter exoplanets with the largest timing uncertainty. We collected 120 professional and amateur transit light curves of the targets of interest, observed with 0.3m to 2.2m telescopes, and analyzed them including the timing information of the planets discovery papers. In the case of WASP-117b, we measured a timing deviation compared to the known ephemeris of about 3.5 hours, for HAT-P-29b and HAT-P-31b the deviation amounted to about 2 hours and more. For all targets, the new ephemeris predicts transit timings with uncertainties of less than 6 minutes in the year 2018 and less than 13 minutes until 2025. Thus, our results allow for an accurate scheduling of follow-up observations in the next decade.

Item Type: Journal Item
Copyright Holders: 2019 ESO
ISSN: 1432-0746
Keywords: observational methods; photometric techniques; planets and satellites; fundamental parameters
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Astronomy
Item ID: 58366
Depositing User: Mark Salisbury
Date Deposited: 21 Dec 2018 11:14
Last Modified: 21 Jan 2020 17:27
URI: http://oro.open.ac.uk/id/eprint/58366
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