ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations

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dc.authoridLekkas, Georgios/0000-0003-3559-0840
dc.authoridRuocco, Nello/0009-0006-0421-8957
dc.authoridEvans, Phil/0000-0002-5674-2404
dc.authoridFowler, Martin/0000-0003-4211-3671
dc.authoridPereira, Cedric/0000-0002-2839-6479
dc.authoridMugnai, Lorenzo/0000-0002-9007-9802
dc.authoridBelinski, Alexander/0000-0003-3469-0989
dc.contributor.authorKokori, A.
dc.contributor.authorTsiaras, A.
dc.contributor.authorEdwards, B.
dc.contributor.authorJones, A.
dc.contributor.authorPantelidou, G.
dc.contributor.authorTinetti, G.
dc.contributor.authorBewersdorff, L.
dc.date.accessioned2025-03-07T20:19:26Z
dc.date.available2025-03-07T20:19:26Z
dc.date.issued2023
dc.departmentÇağ Üniversitesi
dc.description.abstractThe ExoClock project has been created to increase the efficiency of the Ariel mission. It will achieve this by continuously monitoring and updating the ephemerides of Ariel candidates, in order to produce a consistent catalog of reliable and precise ephemerides. This work presents a homogenous catalog of updated ephemerides for 450 planets, generated by the integration of similar to 18,000 data points from multiple sources. These sources include observations from ground-based telescopes (the ExoClock network and the Exoplanet Transit Database), midtime values from the literature, and light curves from space telescopes (Kepler, K2, and TESS). With all the above, we manage to collect observations for half of the postdiscovery years (median), with data that have a median uncertainty less than 1 minute. In comparison with the literature, the ephemerides generated by the project are more precise and less biased. More than 40% of the initial literature ephemerides had to be updated to reach the goals of the project, as they were either of low precision or drifting. Moreover, the integrated approach of the project enables both the monitoring of the majority of the Ariel candidates (95%), and also the identification of missing data. These results highlight the need for continuous monitoring to increase the observing coverage of the candidate planets. Finally, the extended observing coverage of planets allows us to detect trends (transit-timing variations) for a sample of 19 planets. All the products, data, and codes used in this work are open and accessible to the wider scientific community.
dc.description.sponsorshipUKSA/STFC [ST/W00254X/1, ST/W006960/1]; NASA Explorer Program; NASA [NAS 5-26555, NNX16AC65A]; French and Italian polar agency IPEV; French and Italian polar agency PNRA; European Union [803193/BEBOP]; Science and Technology Facilities Council (STFC) [ST/S00193X/1, ST/T000295/1]; Laboratoire Lagrange [CNRS UMR 7293]; Universite Cote d'Azur, through Idex UCAJEDI [ANR-15-IDEX-01]; Ministry of Science and Higher Education of the Russian Federation [075-152020-780 (N13.1902.21.0039)]; City Council and Management of Cernusco sul Naviglio; Ile-de-France Region; Horizon 2020 framework program for research and innovation, under the Marie SklodowskaCurie grant [607 945298]; Slovak Research and Development Agency [APVV-20-0148]; Faculty of Science, P. J. Safarik University in Kosice [VVGS-PF-2021-2087]; MEYS (Czech Republic) [MEYS LTT17006]; ASI [2021-5-HH.0]; [BKM-574/RAu-11/2022]; [32/014/ SDU/10-22-20]; [BK-246/RAu-11/2022]
dc.description.sponsorshipThe ExoClock project has received funding from the UKSA/STFC grants ST/W00254X/1 and ST/W006960/1. This work has made use of data collected with the TESS mission, obtained from the MAST data archive at the Space Telescope Science Institute (STScI). Funding for the TESS mission is provided by the NASA Explorer Program. STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. This work has made use of observations made by the MicroObservatory, which is maintained and operated as an educational service by the Center for Astrophysics, Harvard & Smithsonian, as a project of NASA's Universe of Learning, supported by NASA Award No. NNX16AC65A. ASTEP has benefited from the support of the French and Italian polar agencies IPEV and PNRA, and from INSU, the European Space Agency (ESA), through the Science Faculty of the European Space Research and Technology Center (ESTEC), the University of Birmingham, the European Union's Horizon 2020 research and innovation program (grant agreement No. 803193/BEBOP), the Science and Technology Facilities Council (STFC; grant No. ST/S00193X/1), the Laboratoire Lagrange (CNRS UMR 7293), and the Universite Cote d'Azur, through Idex UCAJEDI (ANR-15-IDEX-01). Members from the Silesian University of Technology were responsible for (1) the planning of observations; (2) the automation of the work in observatories; and (3) the processing of the data from the SUTO network. P.J.W. acknowledges support from grants BKM-574/RAu-11/2022 and 32/014/ SDU/10-22-20. Other authors from the Silesian University of Technology acknowledge grant BK-246/RAu-11/2022. A.A.B. is supported by the Ministry of Science and Higher Education of the Russian Federation under the grant 075-152020-780 (N13.1902.21.0039). M. Cataneo, E.R., and M. Cilluffo thank the City Council and Management of Cernusco sul Naviglio for supporting the activity of the Associazione Cernuschese Astrofili and for the construction of the public observatory G. Barletta. B.E. is a Laureate of the Paris Region fellowship program, supported by the Ile-de-France Region. This project has received funding under the Horizon 2020 framework program for research and innovation, under the Marie SklodowskaCurie grant agreement No. 607 945298. P. Gajdos is supported by the Slovak Research and Development Agency, under contract No. APVV-20-0148 and internal grant VVGS-PF-2021-2087 of the Faculty of Science, P. J. Safarik University in Kosice. C.A.H. and U. Kolb are supported by STFC, under grant ST/T000295/1. M. Masek is supported by MEYS (Czech Republic), under the project MEYS LTT17006. L.V.M. is funded by ASI grant No. 2021-5-HH.0.
dc.identifier.doi10.3847/1538-4365/ac9da4
dc.identifier.issn0067-0049
dc.identifier.issn1538-4365
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85148479164
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.3847/1538-4365/ac9da4
dc.identifier.urihttps://hdl.handle.net/20.500.12507/3175
dc.identifier.volume265
dc.identifier.wosWOS:000981818400001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherIop Publishing Ltd
dc.relation.ispartofAstrophysical Journal Supplement Series
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20241226
dc.titleExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations
dc.typeArticle

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