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The PLATO Solar-like Light-curve Simulator. A tool to generate realistic stellar light-curves with instrumental effects representative of the PLATO mission

Samadi, R. and Deru, A. and Reese, D. and Marchiori, V. and Grolleau, E. and Green, J. J. and Pertenais, Martin and Lebreton, Y. and Deheuvels, S. and Mosser, B. and Belkacem, K. and Börner, Anko and Smith, Alexis (2019) The PLATO Solar-like Light-curve Simulator. A tool to generate realistic stellar light-curves with instrumental effects representative of the PLATO mission. Astronomy & Astrophysics, 624, A117. EDP Sciences. DOI: 10.1051/0004-6361/201834822 ISSN 0004-6361

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Abstract

Context. ESA's PLATO space mission, to be launched by the end of 2026, aims to detect and characterise Earth-like planets in their habitable zone using asteroseismology and the analysis of the transit events. The preparation of science objectives will require the implementation of hare-and-hound exercises relying on the massive generation of representative simulated light-curves. Aims: We developed a light-curve simulator named the PLATO Solar-like Light-curve Simulator (PSLS) in order to generate light-curves representative of typical PLATO targets, that is showing simultaneously solar-like oscillations, stellar granulation, and magnetic activity. At the same time, PSLS also aims at mimicking in a realistic way the random noise and the systematic errors representative of the PLATO multi-telescope concept. Methods: To quantify the instrumental systematic errors, we performed a series of simulations at pixel level that include various relevant sources of perturbations expected for PLATO. From the simulated pixels, we extract the photometry as planned on-board and also simulate the quasi-regular updates of the aperture masks during the observations. The simulated light-curves are then corrected for instrumental effects using the instrument point spread functions reconstructed on the basis of a microscanning technique that will be operated during the in-flight calibration phases of the mission. These corrected and simulated light-curves are then fitted by a parametric model, which we incorporated in PSLS. Simulation of the oscillations and granulation signals rely on current state-of-the-art stellar seismology. Results: We show that the instrumental systematic errors dominate the signal only at frequencies below ˜20 muHz. The systematic errors level is found to mainly depend on stellar magnitude and on the detector charge transfer inefficiency. To illustrate how realistic our simulator is, we compared its predictions with observations made by Kepler on three typical targets and found a good qualitative agreement with the observations. Conclusions: PSLS reproduces the main properties of expected PLATO light-curves. Its speed of execution and its inclusion of relevant stellar signals as well as sources of noises representative of the PLATO cameras make it an indispensable tool for the scientific preparation of the PLATO mission.

Item URL in elib:https://elib.dlr.de/127409/
Document Type:Article
Title:The PLATO Solar-like Light-curve Simulator. A tool to generate realistic stellar light-curves with instrumental effects representative of the PLATO mission
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Samadi, R.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, France );UNSPECIFIED
Deru, A.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, FranceUNSPECIFIED
Reese, D.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, FranceUNSPECIFIED
Marchiori, V.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, France; Escola Politecnica - Departamento de Engenharia de Telecomunicacoes e Controle, Universidade dUNSPECIFIED
Grolleau, E.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, FranceUNSPECIFIED
Green, J. J.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, FranceUNSPECIFIED
Pertenais, MartinMartin.Pertenais (at) dlr.deUNSPECIFIED
Lebreton, Y.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, France; Univ. Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, FranceUNSPECIFIED
Deheuvels, S.IRAP, Universite de Toulouse, CNRS, CNES, UPS, Toulouse, FranceUNSPECIFIED
Mosser, B.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, FranceUNSPECIFIED
Belkacem, K.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, FranceUNSPECIFIED
Börner, AnkoAnko.Boerner (at) dlr.deUNSPECIFIED
Smith, AlexisAlexis.Smith (at) dlr.deUNSPECIFIED
Date:2019
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:624
DOI :10.1051/0004-6361/201834822
Page Range:A117
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:asteroseismology, stars: oscillations, techniques: image processing, techniques: photometric, methods: numerical
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt COROT Beteiligung
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Space Instruments
Institute of Optical Sensor Systems > Real-Time Data Processing
Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Smith, Alexis
Deposited On:14 Jun 2019 09:47
Last Modified:07 Aug 2019 15:38

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