Exoclock project. IV. A homogeneous catalog of 620 updated exoplanet ephemerides

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dc.authorid0000-0002-3076-164X
dc.contributor.authorKokori, A.
dc.contributor.authorTsiaras, A.
dc.contributor.authorPantelidou, G.
dc.contributor.authorJones, A.
dc.contributor.authorSiakas, A.
dc.contributor.authorEdwards, B.
dc.contributor.authorTinetti, G.
dc.contributor.authorWünsche, A.
dc.contributor.authorSolmaz, Arif
dc.contributor.authorLibotte, F.
dc.date.accessioned2026-03-17T12:07:25Z
dc.date.available2026-03-17T12:07:25Z
dc.date.issued2026
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Mekatronik Mühendisliği Bölümü
dc.description.abstractThe ExoClock project is an open platform aiming to monitor exoplanets by integrating observations from space- and ground-based telescopes. This study presents an updated catalog of 620 exoplanet ephemerides, integrating 30,000 measurements from ground-based telescopes (the ExoClock network), literature, and space telescopes (Kepler, K2 and TESS). The updated catalog includes 277 planets from TESS which require special observing strategies due to their shallow transits or bright host stars. This study demonstrates that data from larger telescopes, and the employment of new methodologies such as synchronous observations with small telescopes, are capable of monitoring special cases of planets. The new ephemerides show that 45% of the planets required an update while the results show an improvement of 1 order of magnitude in prediction uncertainty. The collective analysis also enabled the identification of new planets showing transit-timing variations, highlighting the importance of extensive observing coverage. Developed in the context of the ESA’s Ariel space mission, with the goal of delivering a catalog with reliable ephemerides to increase the mission efficiency, ExoClock’s scope and service have grown well beyond the remit of Ariel. The ExoClock project has been operating in the framework of open science, and all tools and products are accessible to everyone within academia and beyond, to support efficient scheduling of future exoplanet observations, especially from larger telescopes where the pressure for time allocation efficiency is higher (Ariel, JWST, VLT, ELT, Subaru etc.). The inclusion of diverse audiences in the process and the collaborative mode not only foster democratization of science but also enhance the quality of the results.
dc.identifier.citationKokori, A., Tsiaras, A., Pantelidou, G., Jones, A., Siakas, A., Edwards, B., Tinetti, G., Wünsche, A., Solmaz, A., & Libotte, F. (2026). Exoclock project. IV. A homogeneous catalog of 620 updated exoplanet ephemerides. The Astrophysical Journal Supplement Series, 283, pp. 1-27. https://doi.org/10.3847/1538-4365/ae3238
dc.identifier.doi10.3847/1538-4365/ae3238
dc.identifier.endpage27
dc.identifier.issn0067-0049
dc.identifier.issn1538-4365
dc.identifier.scopusqualityQ1
dc.identifier.startpage1
dc.identifier.urihttps://doi.org/10.3847/1538-4365/ae3238
dc.identifier.urihttps://hdl.handle.net/20.500.13055/1366
dc.identifier.volume283
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.indekslendigikaynak.otherSCI-E - Science Citation Index Expanded
dc.institutionauthorSolmaz, Arif
dc.institutionauthorid0000-0002-3076-164X
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.relation.ispartofThe Astrophysical Journal Supplement Series
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleExoclock project. IV. A homogeneous catalog of 620 updated exoplanet ephemerides
dc.typeArticle
dspace.entity.typePublication

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