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Related papers: An algorithm for correcting CoRoT raw light curves

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When a planet occults a spotty area on a stellar surface, the flux increases and a characteristic feature in a light curve - a bump - is observed. Among the planets detected by the CoRoT-mission CoRoT-18 is especially interesting as it…

Earth and Planetary Astrophysics · Physics 2020-01-08 St. Raetz , A. M. Heras , P. Gondoin , M. Fernández , V. Casanova , T. O. B. Schmidt , G. Maciejewski

Aims. The CoRoT space mission continues to photometrically monitor about 12 000 stars in its field-of-view for a series of target fields to search for transiting extrasolar planets ever since 2007. Deep transit signals can be detected…

A lightcurve of the eclipsing binary CM Draconis has been analyzed for the presence of transits of planets of size >= 2.5 Earth-radii (Re), with periods of 60 days or less, and in co-planar orbits around the binary system. About 400 million…

Substellar companions such as exoplanets and brown dwarfs exhibit changes in brightness arising from top-of-atmosphere inhomogeneities, providing insights into their atmospheric structure and dynamics. This variability can be measured in…

Stellar activity is ubiquitous in late-type stars. The special geometry of eclipsing binary systems is particularly advantageous to study the stellar surfaces and activity. We present a detailed study of the 145 d CoRoT light curve of the…

Solar and Stellar Astrophysics · Physics 2019-04-12 S. Czesla , S. Terzenbach , R. Wichmann , J. H. M. M. Schmitt

We suggest a new algorithm to remove systematic effects in a large set of lightcurves obtained by a photometric survey. The algorithm can remove systematic effects, like the ones associated with atmospheric extinction, detector efficiency,…

Astrophysics · Physics 2009-11-10 Omer Tamuz , Tsevi Mazeh , Shay Zucker

The BEST wide-angle telescope installed at the Observatoire de Haute-Provence and operated in remote control from Berlin by the Institut fuer Planetenforschung, DLR, has observed the CoRoT target fields prior to the mission. The resulting…

Earth and Planetary Astrophysics · Physics 2015-05-14 H. Rauer , A. Erikson , P. Kabath , P. Hedelt , M. Boer , L. Carone , Sz. Csizmadia , P. Eigmueller , P. v. Paris , S. Renner , G. Tournois , R. Titz , H. Voss

Crater cataloging is an important yet time-consuming part of geological mapping. We present an automated Crater Detection Algorithm (CDA) that is competitive with expert-human researchers and hundreds of times faster. The CDA uses multiple…

Earth and Planetary Astrophysics · Physics 2020-11-19 Christopher Lee , James Hogan

The space experiment CoRoT will provide continuous monitoring and high accuracy light curves of about sixty thousand stars. Selected binary systems will be observed in the Additional Program frame as targets of long and continuous pointed…

Astrophysics · Physics 2016-08-30 Carla Maceroni , Ignasi Ribas

In this work, we explore several ways to detect possible exocomet transits in the TESS (The Transiting Exoplanet Survey Satellite) light curves. The first one has been presented in our previous work, a machine learning approach based on the…

Earth and Planetary Astrophysics · Physics 2026-02-04 D. V. Dobrycheva , I. V. Kulyk , D. R. Karakuts , M. Yu. Vasylenko , Ya. V. Pavlenko , O. S. Shubina , I. V. Luk'yanyk

The pioneer space mission for photometric exoplanet searches, CoRoT, steadily monitors about 12000 stars in each of its fields of view. Transit detection algorithms are applied to derive promising planetary candidates, which are then…

Astrophysics · Physics 2009-11-13 S. Renner , H. Rauer , A. Erikson , P. Hedelt , P. Kabath , R. Titz , H. Voss

The photometric light curves of BRITE satellites were examined through a machine learning technique to investigate whether there are possible exoplanets moving around nearby bright stars. Focusing on different transit periods, several…

Earth and Planetary Astrophysics · Physics 2020-12-21 Li-Chin Yeh , Ing-Guey Jiang

(abridged for arXiv) The BEER algorithm searches stellar light curves for the BEaming, Ellipsoidal, and Reflection photometric modulations that are caused by a short-period companion. Applying the search to the first five long-run center…

Solar and Stellar Astrophysics · Physics 2015-07-22 Lev Tal-Or , Simchon Faigler , Tsevi Mazeh

We present TSARDI, an efficient rejection algorithm designed to improve the transit detection efficiency in data collected by large scale surveys. TSARDI is based on the Machine Learning clustering algorithm DBSCAN, and its purpose is to…

Instrumentation and Methods for Astrophysics · Physics 2018-09-27 D. Mislis , S. Pyrzas , K. A. Alsubai

The transit method allows the detection and characterization of planetary systems by analyzing stellar light curves. Convolutional neural networks appear to offer a viable solution for automating these analyses. In this research, two 1D…

This paper presents an analysis that searched for systematic effects within the CoRoT exoplanet field light curves. The analysis identified a systematic effect that modified the zero point of most CoRoT exposures as a function of stellar…

Earth and Planetary Astrophysics · Physics 2015-05-13 T. Mazeh , P. Guterman , S. Aigrain , S. Zucker , N. Grinberg

Detection of a planetary ring of exoplanets remains as one of the most attractive but challenging goals in the field. We present a methodology of a systematic search for exoplanetary rings via transit photometry of long-period planets. The…

Earth and Planetary Astrophysics · Physics 2017-04-05 Masataka Aizawa , Sho Uehara , Kento Masuda , Hajime Kawahara , Yasushi Suto

The detection of planetary transits in the light curves of active stars, featuring correlated noise in the form of stellar variability, remains a challenge. Depending on the noise characteristics, we show that the traditional technique that…

Earth and Planetary Astrophysics · Physics 2024-07-23 Lionel Garcia , Daniel Foreman-Mackey , Catriona A. Murray , Suzanne Aigrain , Dax L. Feliz , Francisco J. Pozuelos

Data from the Transiting Exoplanet Survey Satellite (TESS) has produced of order one million light curves at cadences of 120 s and especially 1800 s for every ~27-day observing sector during its two-year nominal mission. These data…

Studies of transiting extrasolar planets are of key importance for understanding the nature of planets outside our solar system because their masses, diameters, and bulk densities can be measured. An important part of transit-search…