Our goal is to publish one data release every year, and keep the ephemerides of the Ariel candidates as fresh as possible. Our policy is that every participant that has contributed to the data release either with observations (even one!) or by supporting one of the data-collecting teams, becomes co-author.
ExoClock Project IV: A homogeneous catalogue of 620 updated exoplanet ephemerides
Abstract:
The ExoClock project is an open platform aiming to monitor exoplanets by integrating observations from space and ground based telescopes. This study presents an updated catalogue of 620 exoplanet ephemerides, integrating 30000 measurements from ground-based telescopes (the ExoClock network), literature, and space telescopes (Kepler, K2 and TESS). The updated catalogue 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 one order of magnitude in prediction uncertainty. The collective analysis also enabled the identification of new planets showing TTVs, highlighting the importance of extensive observing coverage. Developed in the context of the ESA’s Ariel space mission, with the goal of delivering a catalogue 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 democratisation of science but also enhance the quality of the results.This is a pre-print! The manuscript has been submitted to ApJS and this version includes the corrections by the reviewer.
ExoClock Project IV: A homogeneous catalogue of 620 updated exoplanet ephemerides (preprint)
2. A. Kokori, A. Tsiaras, B. Edwards et al. (2023).
ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations.
The Astrophysical Journal Supplement Series (published).
3. A. Kokori, A. Tsiaras, B. Edwards et al. (2022).
ExoClock project II: A large-scale integrated study with 180 updated exoplanet ephemerides.
The Astrophysical Journal Supplement Series (published).
4. A. Kokori, A. Tsiaras, B. Edwards et al. (2022).
ExoClock Project: An open platform for monitoring the ephemerides of Ariel targets with contributions from the public.
Experimental Astronomy (published).